diff --git a/src/fr/devinsy/statoolinfos/cli/StatoolInfosCLI.java b/src/fr/devinsy/statoolinfos/cli/StatoolInfosCLI.java
index ef9a0f2..cf461a2 100644
--- a/src/fr/devinsy/statoolinfos/cli/StatoolInfosCLI.java
+++ b/src/fr/devinsy/statoolinfos/cli/StatoolInfosCLI.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2023 Christian Pierre MOMON <christian@momon.org>
+ * Copyright (C) 2020-2024 Christian Pierre MOMON <christian@momon.org>
  * 
  * This file is part of StatoolInfos, simple service statistics tool.
  * 
@@ -124,6 +124,8 @@ public final class StatoolInfosCLI
         message.appendln("    statoolinfos stat ip       [-bot|-nobot] <logfilesorconfigfile>  generate stats about ip from http log file");
         message.appendln("    statoolinfos stat ua       [-bot|-nobot] <logfilesorconfigfile>  generate stats about user agent from http log file");
         message.appendln("    statoolinfos stat visitor  [-bot|-nobot] <logfilesorconfigfile>  generate stats about visitor (ip+ua) from http log file");
+        message.appendln("    statoolinfos list errfile                <logfilesorconfigfile>  display http error log files");
+        message.appendln("    statoolinfos list errlog                 <logfilesorconfigfile>  display http error log lines");
 
         System.out.print(message.toString());
     }
@@ -351,7 +353,7 @@ public final class StatoolInfosCLI
         {
             File configurationFile = new File(StringUtils.trim(args[2]));
 
-            StatoolInfos.listFiles(configurationFile);
+            StatoolInfos.listAccessFiles(configurationFile);
         }
         else if (CLIUtils.isMatchingEllipsis(args, "list", "(file|files)", ".+"))
         {
@@ -361,7 +363,23 @@ public final class StatoolInfosCLI
                 source.add(new File(args[index]));
             }
 
-            StatoolInfos.listFiles(source);
+            StatoolInfos.listAccessFiles(source);
+        }
+        else if (CLIUtils.isMatching(args, "list", "(errfile|errfiles)", ".+\\.conf"))
+        {
+            File configurationFile = new File(StringUtils.trim(args[2]));
+
+            StatoolInfos.listErrorFiles(configurationFile);
+        }
+        else if (CLIUtils.isMatchingEllipsis(args, "list", "(errfile|errfiles)", ".+"))
+        {
+            Files source = new Files();
+            for (int index = 2; index < args.length; index++)
+            {
+                source.add(new File(args[index]));
+            }
+
+            StatoolInfos.listErrorFiles(source);
         }
         else if (CLIUtils.isMatching(args, "list", "(log|logs)", "(-all|-bot|-nobot)", ".+\\.conf*"))
         {
@@ -397,6 +415,22 @@ public final class StatoolInfosCLI
 
             StatoolInfos.listLogs(source, BotFilter.ALL);
         }
+        else if (CLIUtils.isMatching(args, "list", "(errlog|errlogs)", ".+\\.conf"))
+        {
+            File configurationFile = new File(StringUtils.trim(args[2]));
+
+            StatoolInfos.listErrorLogs(configurationFile);
+        }
+        else if (CLIUtils.isMatchingEllipsis(args, "list", "(errlog|errlogs)", ".+"))
+        {
+            Files source = new Files();
+            for (int index = 2; index < args.length; index++)
+            {
+                source.add(new File(args[index]));
+            }
+
+            StatoolInfos.listErrorLogs(source);
+        }
         else if (CLIUtils.isMatching(args, "list", "(useragent|ua)", "(-all|-bot|-nobot)", ".+\\.conf*"))
         {
             BotFilter filter = parseLogFilterOption(args[2]);
diff --git a/src/fr/devinsy/statoolinfos/core/Configuration.java b/src/fr/devinsy/statoolinfos/core/Configuration.java
index a73d26e..963e2ba 100644
--- a/src/fr/devinsy/statoolinfos/core/Configuration.java
+++ b/src/fr/devinsy/statoolinfos/core/Configuration.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2023 Christian Pierre MOMON <christian@momon.org>
+ * Copyright (C) 2020-2024 Christian Pierre MOMON <christian@momon.org>
  * 
  * This file is part of StatoolInfos, simple service statistics tool.
  * 
@@ -25,6 +25,7 @@ import java.net.URL;
 import org.apache.commons.lang3.StringUtils;
 
 import fr.devinsy.statoolinfos.properties.PathProperties;
+import fr.devinsy.statoolinfos.properties.PathProperty;
 import fr.devinsy.statoolinfos.properties.PathPropertyList;
 import fr.devinsy.strings.StringList;
 
@@ -54,6 +55,23 @@ public class Configuration extends PathPropertyList
         super(properties);
     }
 
+    /**
+     * Adds the.
+     *
+     * @param path
+     *            the path
+     * @param value
+     *            the value
+     */
+    public void add(final String path, final String value)
+    {
+        if (!StringUtils.isBlank(path))
+        {
+            PathProperty property = new PathProperty(path, value);
+            this.add(property);
+        }
+    }
+
     /**
      * Gets the builds the directory.
      *
@@ -443,6 +461,36 @@ public class Configuration extends PathPropertyList
         return result;
     }
 
+    /**
+     * Gets the probe http error log date time pattern.
+     *
+     * @return the probe http error log date time pattern
+     */
+    public String getProbeHttpErrorLogDateTimePattern()
+    {
+        String result;
+
+        result = get("conf.probe.httperrorlog.datetimepattern");
+
+        //
+        return result;
+    }
+
+    /**
+     * Gets the probe http error log pattern.
+     *
+     * @return the probe http error log pattern
+     */
+    public String getProbeHttpErrorLogPattern()
+    {
+        String result;
+
+        result = get("conf.probe.httperroorlog.pattern");
+
+        //
+        return result;
+    }
+
     /**
      * Gets the probe http error log source.
      *
diff --git a/src/fr/devinsy/statoolinfos/core/StatoolInfos.java b/src/fr/devinsy/statoolinfos/core/StatoolInfos.java
index 67ce9ad..cf0359f 100644
--- a/src/fr/devinsy/statoolinfos/core/StatoolInfos.java
+++ b/src/fr/devinsy/statoolinfos/core/StatoolInfos.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2023 Christian Pierre MOMON <christian@momon.org>
+ * Copyright (C) 2020-2024 Christian Pierre MOMON <christian@momon.org>
  * 
  * This file is part of StatoolInfos, simple service statistics tool.
  * 
@@ -33,8 +33,10 @@ import fr.devinsy.statoolinfos.build.Builder;
 import fr.devinsy.statoolinfos.crawl.Crawler;
 import fr.devinsy.statoolinfos.htmlize.Htmlizer;
 import fr.devinsy.statoolinfos.metrics.Prober;
-import fr.devinsy.statoolinfos.metrics.http.HttpAccessLog;
-import fr.devinsy.statoolinfos.metrics.http.HttpAccessLogs;
+import fr.devinsy.statoolinfos.metrics.httpaccess.HttpAccessLog;
+import fr.devinsy.statoolinfos.metrics.httpaccess.HttpAccessLogs;
+import fr.devinsy.statoolinfos.metrics.httperrorlog.HttpErrorLog;
+import fr.devinsy.statoolinfos.metrics.httperrorlog.HttpErrorLogs;
 import fr.devinsy.statoolinfos.properties.PathProperties;
 import fr.devinsy.statoolinfos.properties.PathPropertyUtils;
 import fr.devinsy.statoolinfos.stats.ip.IpStat;
@@ -169,7 +171,7 @@ public class StatoolInfos
      * @param configurationFile
      *            the configuration file
      */
-    public static void listFiles(final File configurationFile)
+    public static void listAccessFiles(final File configurationFile)
     {
         try
         {
@@ -209,7 +211,7 @@ public class StatoolInfos
      * @param files
      *            the files
      */
-    public static void listFiles(final Files files)
+    public static void listAccessFiles(final Files files)
     {
         if (files != null)
         {
@@ -223,6 +225,140 @@ public class StatoolInfos
         }
     }
 
+    /**
+     * List error files.
+     *
+     * @param configurationFile
+     *            the configuration file
+     */
+    public static void listErrorFiles(final File configurationFile)
+    {
+        try
+        {
+            if ((configurationFile == null) || (!configurationFile.exists()))
+            {
+                System.out.println("No configuration file found.");
+            }
+            else
+            {
+                System.out.println("Listing HttpErrorLog files from [" + configurationFile.toString() + "]");
+                Configuration configuration = Factory.loadConfiguration(configurationFile);
+
+                logger.info("== List HttpErrorLog files.");
+                String source = configuration.getProbeHttpErrorLogSource();
+                logger.info("source=[{}]", source);
+
+                Files files = FilesUtils.searchByWildcard(source);
+                for (File file : files)
+                {
+                    System.out.println(file.getAbsolutePath());
+                }
+            }
+        }
+        catch (StatoolInfosException exception)
+        {
+            exception.printStackTrace();
+        }
+        catch (IOException exception)
+        {
+            exception.printStackTrace();
+        }
+    }
+
+    /**
+     * List error files.
+     *
+     * @param files
+     *            the files
+     */
+    public static void listErrorFiles(final Files files)
+    {
+        if (files != null)
+        {
+            System.out.println("Listing HttpErrorLog files from [" + files.toString() + "]");
+
+            logger.info("== List HttpErrorLog files");
+            for (File file : files)
+            {
+                System.out.println(file.getAbsolutePath());
+            }
+        }
+    }
+
+    /**
+     * List error logs.
+     *
+     * @param configurationFile
+     *            the configuration file
+     */
+    public static void listErrorLogs(final File configurationFile)
+    {
+        try
+        {
+            if ((configurationFile == null) || (!configurationFile.exists()))
+            {
+                System.out.println("No configuration file found.");
+            }
+            else
+            {
+                System.out.println("Testing HttpErrorLog lines from [" + configurationFile.toString() + "]");
+                Configuration configuration = Factory.loadConfiguration(configurationFile);
+
+                logger.info("== Testing HttpErrorLog lines.");
+                String source = configuration.getProbeHttpErrorLogSource();
+                String dateTimePattern = configuration.getProbeHttpErrorLogDateTimePattern();
+                String pattern = configuration.getProbeHttpErrorLogPattern();
+                logger.info("source=[{}]", source);
+                logger.info("pattern=[{}]", pattern);
+                logger.info("dateTimePattern=[{}]", dateTimePattern);
+
+                HttpErrorLogs logs = new HttpErrorLogs(FilesUtils.searchByWildcard(source), pattern, dateTimePattern);
+
+                for (HttpErrorLog log : logs)
+                {
+                    System.out.println(log.toStringLog());
+                }
+            }
+        }
+        catch (Exception exception)
+        {
+            logger.error("Error: {}", exception.getMessage());
+            exception.printStackTrace();
+        }
+    }
+
+    /**
+     * List error logs.
+     *
+     * @param source
+     *            the source
+     */
+    public static void listErrorLogs(final Files source)
+    {
+        try
+        {
+            HttpErrorLogs logs = new HttpErrorLogs(source);
+            for (HttpErrorLog log : logs)
+            {
+                System.out.println(log.toStringLog());
+            }
+        }
+        catch (IllegalArgumentException exception)
+        {
+            System.out.println("Bad format line detected. Aborting…");
+            exception.printStackTrace();
+        }
+        catch (DateTimeParseException exception)
+        {
+            System.out.println("Bad datetime format detected. Aborting…");
+        }
+        catch (IOException exception)
+        {
+            System.out.println("File error detected. Aborting…");
+            exception.printStackTrace();
+        }
+    }
+
     /**
      * List ips.
      *
diff --git a/src/fr/devinsy/statoolinfos/metrics/PathCounters.java b/src/fr/devinsy/statoolinfos/metrics/PathCounters.java
index 4948c9d..7d49c21 100644
--- a/src/fr/devinsy/statoolinfos/metrics/PathCounters.java
+++ b/src/fr/devinsy/statoolinfos/metrics/PathCounters.java
@@ -111,6 +111,33 @@ public class PathCounters extends HashMap<String, PathCounter>
         return result;
     }
 
+    /**
+     * Gets the count.
+     *
+     * @param path
+     *            the path
+     * @param timeMark
+     *            the time mark
+     * @return the count
+     */
+    public long getCount(final String path, final String timeMark)
+    {
+        long result;
+
+        PathCounter counter = get(path, timeMark);
+        if (counter == null)
+        {
+            result = 0;
+        }
+        else
+        {
+            result = counter.getCounter();
+        }
+
+        //
+        return result;
+    }
+
     /**
      * Gets the days values line.
      *
diff --git a/src/fr/devinsy/statoolinfos/metrics/Prober.java b/src/fr/devinsy/statoolinfos/metrics/Prober.java
index 844b26d..9c0fd27 100644
--- a/src/fr/devinsy/statoolinfos/metrics/Prober.java
+++ b/src/fr/devinsy/statoolinfos/metrics/Prober.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2023 Christian Pierre MOMON <christian@momon.org>
+ * Copyright (C) 2020-2024 Christian Pierre MOMON <christian@momon.org>
  * 
  * This file is part of StatoolInfos, simple service statistics tool.
  * 
@@ -43,9 +43,10 @@ import fr.devinsy.statoolinfos.core.StatoolInfosUtils;
 import fr.devinsy.statoolinfos.metrics.etherpad.EtherpadProber;
 import fr.devinsy.statoolinfos.metrics.gitea.GiteaProber;
 import fr.devinsy.statoolinfos.metrics.gsl.GSLProber;
-import fr.devinsy.statoolinfos.metrics.http.HttpAccessLogAnalyzer;
-import fr.devinsy.statoolinfos.metrics.http.HttpAccessLogs;
+import fr.devinsy.statoolinfos.metrics.httpaccess.HttpAccessLogAnalyzer;
+import fr.devinsy.statoolinfos.metrics.httpaccess.HttpAccessLogs;
 import fr.devinsy.statoolinfos.metrics.httperrorlog.HttpErrorLogAnalyzer;
+import fr.devinsy.statoolinfos.metrics.httperrorlog.HttpErrorLogs;
 import fr.devinsy.statoolinfos.metrics.libreqr.LibreQRProber;
 import fr.devinsy.statoolinfos.metrics.minetest.MinetestProber;
 import fr.devinsy.statoolinfos.metrics.mumble.MumbleProber;
@@ -371,15 +372,32 @@ public class Prober
         return result;
     }
 
+    /**
+     * Probe http error log.
+     *
+     * @param configuration
+     *            the configuration
+     * @return the path counters
+     * @throws IOException
+     *             Signals that an I/O exception has occurred.
+     * @throws StatoolInfosException
+     *             the statool infos exception
+     */
     public static PathCounters probeHttpErrorLog(final Configuration configuration) throws IOException, StatoolInfosException
     {
         PathCounters result;
 
         logger.info("== Probing HttpErrorLog.");
         String source = configuration.getProbeHttpErrorLogSource();
+        String pattern = configuration.getProbeHttpErrorLogPattern();
+        String dateTimePattern = configuration.getProbeHttpErrorLogDateTimePattern();
         logger.info("source=[{}]", source);
+        logger.info("pattern=[{}]", pattern);
+        logger.info("dateTimePattern=[{}]", dateTimePattern);
 
-        result = HttpErrorLogAnalyzer.probe(source);
+        HttpErrorLogs httpErrorLogs = new HttpErrorLogs(FilesUtils.searchByWildcard(source), pattern, dateTimePattern);
+
+        result = HttpErrorLogAnalyzer.probe(httpErrorLogs);
 
         //
         return result;
diff --git a/src/fr/devinsy/statoolinfos/metrics/httperrorlog/HttpErrorLog.java b/src/fr/devinsy/statoolinfos/metrics/httperrorlog/HttpErrorLog.java
index 05b2b4d..0876c7c 100644
--- a/src/fr/devinsy/statoolinfos/metrics/httperrorlog/HttpErrorLog.java
+++ b/src/fr/devinsy/statoolinfos/metrics/httperrorlog/HttpErrorLog.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2021-2023 Christian Pierre MOMON <christian@momon.org>
+ * Copyright (C) 2021-2024 Christian Pierre MOMON <christian@momon.org>
  * 
  * This file is part of StatoolInfos, simple service statistics tool.
  * 
@@ -43,6 +43,7 @@ public class HttpErrorLog
 
     private LocalDateTime time;
     private String level;
+    private String message;
 
     /**
      * Instantiates a new http error log.
@@ -68,6 +69,11 @@ public class HttpErrorLog
         return this.level;
     }
 
+    public String getMessage()
+    {
+        return this.message;
+    }
+
     public LocalDateTime getTime()
     {
         return this.time;
@@ -141,6 +147,11 @@ public class HttpErrorLog
         this.level = level;
     }
 
+    public void setMessage(final String message)
+    {
+        this.message = message;
+    }
+
     public void setTime(final LocalDateTime time)
     {
         this.time = time;
@@ -166,4 +177,29 @@ public class HttpErrorLog
         //
         return result;
     }
+
+    /**
+     * To string log.
+     *
+     * @return the string
+     */
+    public String toStringLog()
+    {
+        String result;
+
+        // "^(?<remoteAddress>[a-zA-F0-9\\\\:\\\\.]+) - (?<remoteUser>[^\\[]+)
+        // \\[(?<time>[^\\]]+)\\] \"(?<request>.*)\" (?<status>\\d+)
+        // (?<bodyBytesSent>\\d+) \"(?<referer>.*)\"
+        // \"(?<userAgent>[^\"]*)\".*$");
+
+        // result = String.format("%s %s %s \\[%s\\] \"%s\" %d %d \"%s\"
+        // \"%s\"",
+        result = String.format("%s [%s] %s",
+                this.time.format(DateTimeFormatter.ofPattern("dd/MMM/yyyy:HH:mm:ss.SSS", Locale.ENGLISH)),
+                this.level,
+                this.message);
+
+        //
+        return result;
+    }
 }
diff --git a/src/fr/devinsy/statoolinfos/metrics/httperrorlog/HttpErrorLogAnalyzer.java b/src/fr/devinsy/statoolinfos/metrics/httperrorlog/HttpErrorLogAnalyzer.java
index bcac87e..49312a1 100644
--- a/src/fr/devinsy/statoolinfos/metrics/httperrorlog/HttpErrorLogAnalyzer.java
+++ b/src/fr/devinsy/statoolinfos/metrics/httperrorlog/HttpErrorLogAnalyzer.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2023 Christian Pierre MOMON <christian@momon.org>
+ * Copyright (C) 2020-2024 Christian Pierre MOMON <christian@momon.org>
  * 
  * This file is part of StatoolInfos, simple service statistics tool.
  * 
@@ -18,21 +18,15 @@
  */
 package fr.devinsy.statoolinfos.metrics.httperrorlog;
 
-import java.io.File;
 import java.io.IOException;
-import java.time.LocalDateTime;
-import java.time.format.DateTimeFormatter;
-import java.util.Locale;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
 
+import org.apache.commons.lang3.StringUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import fr.devinsy.statoolinfos.core.StatoolInfosException;
 import fr.devinsy.statoolinfos.metrics.PathCounters;
-import fr.devinsy.statoolinfos.util.FilesUtils;
-import fr.devinsy.statoolinfos.util.LineIterator;
+import fr.devinsy.strings.StringList;
 
 /**
  * The Class HttpErrorLogAnalyzer.
@@ -41,11 +35,7 @@ public class HttpErrorLogAnalyzer
 {
     private static Logger logger = LoggerFactory.getLogger(HttpErrorLogAnalyzer.class);
 
-    public static final Pattern NGINX_ERROR_PATTERN = Pattern.compile("^(?<time>\\S+\\s\\S+)\\s\\[(?<level>[^\\]]*)\\]\\s.*$");
-    public static final Pattern APACHE_ERROR_PATTERN = Pattern.compile("^\\[(?<time>[^\\]]+)\\]\\s\\[(?<level>[^\\]]*)\\]\\s(?<message>.*)$");
-
     private PathCounters counters;
-    private int errorCount;
 
     /**
      * Instantiates a new http error log analyzer.
@@ -53,7 +43,6 @@ public class HttpErrorLogAnalyzer
     public HttpErrorLogAnalyzer()
     {
         this.counters = new PathCounters();
-        this.errorCount += 1;
     }
 
     /**
@@ -72,60 +61,6 @@ public class HttpErrorLogAnalyzer
         return result;
     }
 
-    /**
-     * Probe.
-     *
-     * @param file
-     *            the file
-     * @throws IOException
-     *             Signals that an I/O exception has occurred.
-     */
-    public void probe(final File file) throws IOException
-    {
-        if ((file != null) && (!file.isFile()) || (file.exists()))
-        {
-            System.out.println("Probing file [" + file.getAbsolutePath() + "]");
-
-            //
-            Pattern pattern;
-            if (LineIterator.readFirstLine(file).startsWith("["))
-            {
-                pattern = APACHE_ERROR_PATTERN;
-            }
-            else
-            {
-                pattern = NGINX_ERROR_PATTERN;
-            }
-
-            //
-            LineIterator iterator = new LineIterator(file);
-            while (iterator.hasNext())
-            {
-                String line = iterator.next();
-
-                try
-                {
-                    HttpErrorLog log = parseLog(line, pattern);
-                    // logger.info("==================");
-                    if (log == null)
-                    {
-                        logger.warn("LINE IS NOT MATCHING [{}]", line);
-                    }
-                    else
-                    {
-                        probeLog(log);
-                    }
-                }
-                catch (Exception exception)
-                {
-                    logger.warn("Error parsing line [{}][{}]", line, exception.getMessage());
-                    // exception.printStackTrace();
-                    this.errorCount += 1;
-                }
-            }
-        }
-    }
-
     /**
      * Probe log.
      *
@@ -134,111 +69,53 @@ public class HttpErrorLogAnalyzer
      */
     public void probeLog(final HttpErrorLog log)
     {
-        // General HTTP access logs.
-        String year = log.getYear();
-        String yearMonth = log.getYearMonth();
-        String yearWeek = log.getYearWeek();
-        String date = log.getDate();
-
-        // metrics.http.hits
-        this.counters.inc("metrics.http.errors", year, yearMonth, yearWeek, date);
-
-        // TODO metrics.http.errors.php
-    }
-
-    /**
-     * Parses the log.
-     *
-     * @param line
-     *            the line
-     * @param pattern
-     *            the pattern
-     * @return the http error log
-     */
-    public static HttpErrorLog parseLog(final String line, final Pattern pattern)
-    {
-        HttpErrorLog result;
-
-        if (pattern == null)
+        if (log != null)
         {
-            result = null;
-        }
-        else
-        {
-            Matcher matcher = pattern.matcher(line);
-            if (matcher.matches())
+            // General HTTP access logs.
+            String year = log.getYear();
+            String yearMonth = log.getYearMonth();
+            String yearWeek = log.getYearWeek();
+            String date = log.getDate();
+
+            // metrics.http.hits
+            this.counters.inc("metrics.http.errors", year, yearMonth, yearWeek, date);
+
+            // TODO metrics.http.errors.php
+            if (StringUtils.containsIgnoreCase(log.getLevel(), "php"))
             {
-                result = new HttpErrorLog();
-                if (pattern == APACHE_ERROR_PATTERN)
-                {
-                    result.setTime(LocalDateTime.parse(matcher.group("time"), DateTimeFormatter.ofPattern("EEE MMM dd HH:mm:ss.SSSSSS yyyy").withLocale(Locale.ENGLISH)));
-                }
-                else if (pattern == NGINX_ERROR_PATTERN)
-                {
-                    result.setTime(LocalDateTime.parse(matcher.group("time"), DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss").withLocale(Locale.ENGLISH)));
-                }
-                result.setLevel(matcher.group("level"));
-            }
-            else
-            {
-                result = null;
+                this.counters.inc("metrics.http.errors.php", year, yearMonth, yearWeek, date);
             }
         }
-
-        //
-        return result;
-    }
-
-    /**
-     * Parses the nginx log.
-     *
-     * @param line
-     *            the line
-     * @return the http error log
-     */
-    public static HttpErrorLog parseNginxLog(final String line)
-    {
-        HttpErrorLog result;
-
-        // log_format combined '$remote_addr - $remote_user [$time_local] '
-        // '"$request" $status $body_bytes_sent '
-        // '"$http_referer" "$http_user_agent"';
-        // String pattern = "^(?<time>\\d{4}/\\d{2}/\\d{2} \\d{2}:\\d{2}:\\d{2})
-        // \\[(?<level>[^\\]])\\] .*$";
-        String patternString = "^(?<time>\\S+\\s\\S+)\\s\\[(?<level>[^\\]]*)\\]\\s.*$";
-
-        Pattern pattern = Pattern.compile(patternString);
-
-        result = parseLog(line, pattern);
-
-        //
-        return result;
     }
 
     /**
      * Probe.
      *
-     * @param source
-     *            the source
+     * @param logs
+     *            the logs
      * @return the path counters
      * @throws IOException
      *             Signals that an I/O exception has occurred.
      * @throws StatoolInfosException
      *             the statool infos exception
      */
-    public static PathCounters probe(final String source) throws IOException, StatoolInfosException
+    public static PathCounters probe(final HttpErrorLogs logs) throws IOException, StatoolInfosException
     {
         PathCounters result;
 
         HttpErrorLogAnalyzer analyzer = new HttpErrorLogAnalyzer();
 
-        for (File file : FilesUtils.searchByWildcard(source))
+        HttpErrorLogIterator logIterator = (HttpErrorLogIterator) logs.iterator();
+        while (logIterator.hasNext())
         {
-            analyzer.probe(file);
+            analyzer.probeLog(logIterator.next());
         }
-
         result = analyzer.getCounters();
 
+        StringList timemarks = result.getNowTimeMarks();
+        analyzer.getCounters().set(logIterator.getLogCount(), "metrics.http.logs.count", timemarks);
+        analyzer.getCounters().set(logIterator.getFailedLogCount(), "metrics.http.logs.failed", timemarks);
+
         //
         return result;
     }
diff --git a/src/fr/devinsy/statoolinfos/metrics/httperrorlog/HttpErrorLogIterator.java b/src/fr/devinsy/statoolinfos/metrics/httperrorlog/HttpErrorLogIterator.java
new file mode 100644
index 0000000..409bed7
--- /dev/null
+++ b/src/fr/devinsy/statoolinfos/metrics/httperrorlog/HttpErrorLogIterator.java
@@ -0,0 +1,275 @@
+/*
+ * Copyright (C) 2022-2024 Christian Pierre MOMON <christian@momon.org>
+ * 
+ * This file is part of StatoolInfos, simple service statistics tool.
+ * 
+ * StatoolInfos is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ * 
+ * StatoolInfos is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with StatoolInfos.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package fr.devinsy.statoolinfos.metrics.httperrorlog;
+
+import java.io.IOException;
+import java.time.format.DateTimeFormatter;
+import java.util.Iterator;
+import java.util.Locale;
+import java.util.regex.Pattern;
+
+import org.apache.commons.lang3.StringUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import fr.devinsy.statoolinfos.util.Files;
+import fr.devinsy.statoolinfos.util.FilesLineIterator;
+import fr.devinsy.statoolinfos.util.FilesUtils;
+
+/**
+ * The Class HttpErrorLogIterator.
+ */
+public class HttpErrorLogIterator implements Iterator<HttpErrorLog>
+{
+    private static Logger logger = LoggerFactory.getLogger(HttpErrorLogIterator.class);
+
+    private FilesLineIterator lineIterator;
+    private Pattern pattern;
+    private DateTimeFormatter dateTimeFormatter;
+    private HttpErrorLog nextLog;
+    private int logCount;
+    private int failedLogCount;
+
+    /**
+     * Instantiates a new http error log iterator.
+     *
+     * @param source
+     *            the source
+     * @throws IOException
+     *             Signals that an I/O exception has occurred.
+     */
+    public HttpErrorLogIterator(final Files source) throws IOException
+    {
+        this(source, null, null);
+    }
+
+    /**
+     * Instantiates a new http error log iterator.
+     *
+     * @param source
+     *            the source
+     * @param regex
+     *            the regex
+     * @throws IOException
+     *             Signals that an I/O exception has occurred.
+     */
+    public HttpErrorLogIterator(final Files source, final String regex) throws IOException
+    {
+        this(source, regex, null);
+    }
+
+    /**
+     * Instantiates a new http error log iterator.
+     *
+     * @param source
+     *            the source
+     * @param linePattern
+     *            the line pattern
+     * @param dateTimePattern
+     *            the date time pattern
+     * @throws IOException
+     *             Signals that an I/O exception has occurred.
+     */
+    public HttpErrorLogIterator(final Files source, final String linePattern, final String dateTimePattern) throws IOException
+    {
+        this.lineIterator = new FilesLineIterator(source);
+        this.nextLog = null;
+        this.logCount = 0;
+        this.failedLogCount = 0;
+
+        Pattern defaultLinePattern;
+        DateTimeFormatter defaultDateTimeFormatter;
+        if ((linePattern == null) || (dateTimePattern == null))
+        {
+            if (isApacheHttpErrorLogFiles(source))
+            {
+                defaultLinePattern = HttpErrorLogParser.APACHE_ERROR_PATTERN;
+                defaultDateTimeFormatter = HttpErrorLogParser.APACHE_ERROR_DATETIME_FORMATTER;
+            }
+            else
+            {
+                defaultLinePattern = HttpErrorLogParser.NGINX_ERROR_PATTERN;
+                defaultDateTimeFormatter = HttpErrorLogParser.NGINX_ERROR_DATETIME_FORMATTER;
+            }
+        }
+        else
+        {
+            // These values will never be used.
+            defaultLinePattern = null;
+            defaultDateTimeFormatter = null;
+        }
+
+        if (StringUtils.isBlank(linePattern))
+        {
+            this.pattern = defaultLinePattern;
+        }
+        else
+        {
+            this.pattern = Pattern.compile(linePattern);
+        }
+
+        if (StringUtils.isBlank(dateTimePattern))
+        {
+            this.dateTimeFormatter = defaultDateTimeFormatter;
+        }
+        else
+        {
+            String[] split = dateTimePattern.split("\\|");
+            if (split.length != 2)
+            {
+                throw new IllegalArgumentException("Bad dateTimePattern format: [" + dateTimePattern + "].");
+            }
+            else
+            {
+                this.dateTimeFormatter = DateTimeFormatter.ofPattern(split[0]).withLocale(Locale.forLanguageTag(split[1]));
+            }
+        }
+    }
+
+    /**
+     * Gets the failed log count.
+     *
+     * @return the failed log count
+     */
+    public int getFailedLogCount()
+    {
+        return this.failedLogCount;
+    }
+
+    /**
+     * Gets the log count.
+     *
+     * @return the log count
+     */
+    public int getLogCount()
+    {
+        return this.logCount;
+    }
+
+    /* (non-Javadoc)
+     * @see java.util.Iterator#hasNext()
+     */
+    @Override
+    public boolean hasNext()
+    {
+        boolean result;
+
+        preload();
+
+        if (this.nextLog == null)
+        {
+            result = false;
+        }
+        else
+        {
+            result = true;
+        }
+
+        //
+        return result;
+    }
+
+    /* (non-Javadoc)
+     * @see java.util.Iterator#next()
+     */
+    @Override
+    public HttpErrorLog next()
+    {
+        HttpErrorLog result;
+
+        preload();
+
+        result = this.nextLog;
+        this.nextLog = null;
+
+        //
+        return result;
+    }
+
+    /**
+     * Forward.
+     */
+    private void preload()
+    {
+        if (this.nextLog == null)
+        {
+            boolean ended = false;
+            while (!ended)
+            {
+                if (this.lineIterator.hasNext())
+                {
+                    String line = this.lineIterator.next();
+                    this.logCount += 1;
+
+                    try
+                    {
+                        HttpErrorLog log = HttpErrorLogParser.parseLog(line, this.pattern, this.dateTimeFormatter);
+                        if (log == null)
+                        {
+                            logger.warn("LINE IS NOT MATCHING [{}]", line);
+                            this.failedLogCount += 1;
+                        }
+                        else
+                        {
+                            this.nextLog = log;
+                            ended = true;
+                        }
+                    }
+                    catch (Exception exception)
+                    {
+                        logger.warn("Error parsing line [{}][{}]", line, exception.getMessage());
+                        this.failedLogCount += 1;
+                        // exception.printStackTrace();
+                    }
+                }
+                else
+                {
+                    this.nextLog = null;
+                    ended = true;
+                }
+            }
+        }
+    }
+
+    /**
+     * Checks if is apache http error log files.
+     *
+     * @param files
+     *            the files
+     * @return true, if is apache http error log files
+     * @throws IOException
+     */
+    public static boolean isApacheHttpErrorLogFiles(final Files files) throws IOException
+    {
+        boolean result;
+
+        String firstLine = FilesUtils.readFirstLineNotBlank(files);
+        if (StringUtils.startsWith(firstLine, "["))
+        {
+            result = true;
+        }
+        else
+        {
+            result = false;
+        }
+
+        //
+        return result;
+    }
+}
diff --git a/src/fr/devinsy/statoolinfos/metrics/httperrorlog/HttpErrorLogParser.java b/src/fr/devinsy/statoolinfos/metrics/httperrorlog/HttpErrorLogParser.java
new file mode 100644
index 0000000..0f8d9f9
--- /dev/null
+++ b/src/fr/devinsy/statoolinfos/metrics/httperrorlog/HttpErrorLogParser.java
@@ -0,0 +1,120 @@
+/*
+ * Copyright (C) 2020-2024 Christian Pierre MOMON <christian@momon.org>
+ * 
+ * This file is part of StatoolInfos, simple service statistics tool.
+ * 
+ * StatoolInfos is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ * 
+ * StatoolInfos is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with StatoolInfos.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package fr.devinsy.statoolinfos.metrics.httperrorlog;
+
+import java.time.LocalDateTime;
+import java.time.ZonedDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.Locale;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * The Class HttpErrorLogParser.
+ */
+public class HttpErrorLogParser
+{
+    private static Logger logger = LoggerFactory.getLogger(HttpErrorLogParser.class);
+
+    public static final Pattern APACHE_ERROR_PATTERN = Pattern.compile("^\\[(?<time>[^\\]]+)\\]\\s\\[(?<level>[^\\]]*)\\]\\s(?<message>.*)$");
+    public static final Pattern NGINX_ERROR_PATTERN = Pattern.compile("^(?<time>\\S+\\s\\S+)\\s\\[(?<level>[^\\]]*)\\]\\s(?<message>.*)$");
+
+    public static final DateTimeFormatter APACHE_ERROR_DATETIME_FORMATTER = DateTimeFormatter.ofPattern("EEE MMM dd HH:mm:ss.SSSSSS yyyy").withLocale(Locale.ENGLISH);
+    public static final DateTimeFormatter NGINX_ERROR_DATETIME_FORMATTER = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss").withLocale(Locale.ENGLISH);
+
+    /**
+     * Instantiates a new http access log parser.
+     */
+    private HttpErrorLogParser()
+    {
+    }
+
+    /**
+     * Parses the date time.
+     *
+     * @param dateTime
+     *            the date time
+     * @param formatter
+     *            the formatter
+     * @return the zoned date time
+     */
+    public static ZonedDateTime parseDateTime(final CharSequence dateTime, final DateTimeFormatter formatter)
+    {
+        ZonedDateTime result;
+
+        if ((dateTime == null) || (formatter == null))
+        {
+            result = null;
+        }
+        else
+        {
+            result = ZonedDateTime.parse(dateTime, formatter);
+        }
+
+        //
+        return result;
+    }
+
+    /**
+     * Parses the log.
+     *
+     * @param line
+     *            the line
+     * @return the http log
+     */
+    public static HttpErrorLog parseLog(final String line, final Pattern pattern, final DateTimeFormatter dateTimeFormatter)
+    {
+        HttpErrorLog result;
+
+        // log_format combined '$remote_addr - $remote_user [$time_local] '
+        // '"$request" $status $body_bytes_sent '
+        // '"$http_referer" "$http_user_agent"';
+        // String pattern = "^(?<time>\\d{4}/\\d{2}/\\d{2} \\d{2}:\\d{2}:\\d{2})
+        // \\[(?<level>[^\\]])\\] .*$";
+        // String patternString =
+        // "^(?<time>\\S+\\s\\S+)\\s\\[(?<level>[^\\]]*)\\]\\s.*$";
+
+        if ((line == null) || (pattern == null) || (dateTimeFormatter == null))
+        {
+            result = null;
+        }
+        else
+        {
+            Matcher matcher = pattern.matcher(line);
+            if (matcher.matches())
+            {
+                result = new HttpErrorLog();
+
+                result.setTime(LocalDateTime.parse(matcher.group("time"), dateTimeFormatter));
+                result.setLevel(matcher.group("level"));
+                result.setMessage(matcher.group("message"));
+            }
+            else
+            {
+                result = null;
+            }
+        }
+
+        //
+        return result;
+    }
+}
diff --git a/src/fr/devinsy/statoolinfos/metrics/httperrorlog/HttpErrorLogs.java b/src/fr/devinsy/statoolinfos/metrics/httperrorlog/HttpErrorLogs.java
new file mode 100644
index 0000000..4124573
--- /dev/null
+++ b/src/fr/devinsy/statoolinfos/metrics/httperrorlog/HttpErrorLogs.java
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2022-2024 Christian Pierre MOMON <christian@momon.org>
+ * 
+ * This file is part of StatoolInfos, simple service statistics tool.
+ * 
+ * StatoolInfos is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ * 
+ * StatoolInfos is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with StatoolInfos.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package fr.devinsy.statoolinfos.metrics.httperrorlog;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Iterator;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import fr.devinsy.statoolinfos.util.Files;
+
+/**
+ * The Class HttpErrorLogs.
+ */
+public class HttpErrorLogs implements Iterable<HttpErrorLog>
+{
+    private static Logger logger = LoggerFactory.getLogger(HttpErrorLogs.class);
+
+    private Files source;
+    private String pattern;
+    private String datePattern;
+
+    /**
+     * Instantiates a new http error logs.
+     *
+     * @param source
+     *            the source
+     * @throws IOException
+     *             Signals that an I/O exception has occurred.
+     */
+    public HttpErrorLogs(final File source) throws IOException
+    {
+        this(new Files(source), null, null);
+    }
+
+    /**
+     * Instantiates a new http error logs.
+     *
+     * @param source
+     *            the source
+     * @param pattern
+     *            the pattern
+     * @throws IOException
+     *             Signals that an I/O exception has occurred.
+     */
+    public HttpErrorLogs(final File source, final String pattern) throws IOException
+    {
+        this(new Files(source), pattern, null);
+    }
+
+    /**
+     * Instantiates a new http error logs.
+     *
+     * @param source
+     *            the source
+     * @param pattern
+     *            the pattern
+     * @param datePattern
+     *            the date pattern
+     * @throws IOException
+     *             Signals that an I/O exception has occurred.
+     */
+    public HttpErrorLogs(final File source, final String pattern, final String datePattern) throws IOException
+    {
+        this(new Files(source), pattern, datePattern);
+    }
+
+    /**
+     * Instantiates a new http error logs.
+     *
+     * @param source
+     *            the source
+     * @throws IOException
+     *             Signals that an I/O exception has occurred.
+     */
+    public HttpErrorLogs(final Files source) throws IOException
+    {
+        this(source, null, null);
+    }
+
+    /**
+     * Instantiates a new http error logs.
+     *
+     * @param source
+     *            the source
+     * @param pattern
+     *            the pattern
+     * @throws IOException
+     *             Signals that an I/O exception has occurred.
+     */
+    public HttpErrorLogs(final Files source, final String pattern) throws IOException
+    {
+        this(source, pattern, null);
+    }
+
+    /**
+     * Instantiates a new http error logs.
+     *
+     * @param source
+     *            the source
+     * @param pattern
+     *            the pattern
+     * @param datePattern
+     *            the date pattern
+     * @throws IOException
+     *             Signals that an I/O exception has occurred.
+     */
+    public HttpErrorLogs(final Files source, final String pattern, final String datePattern) throws IOException
+    {
+        this.source = source;
+        this.pattern = pattern;
+        this.datePattern = datePattern;
+    }
+
+    /* (non-Javadoc)
+     * @see java.lang.Iterable#iterator()
+     */
+    @Override
+    public Iterator<HttpErrorLog> iterator()
+    {
+        HttpErrorLogIterator result;
+
+        try
+        {
+            result = new HttpErrorLogIterator(this.source, this.pattern, this.datePattern);
+        }
+        catch (IOException exception)
+        {
+            throw new IllegalArgumentException("Error with iterator.", exception);
+        }
+
+        //
+        return result;
+    }
+}
diff --git a/test/fr/devinsy/statoolinfos/metrics/httperror/HttpErrorLogsTest.java b/test/fr/devinsy/statoolinfos/metrics/httperror/HttpErrorLogsTest.java
new file mode 100644
index 0000000..dca1527
--- /dev/null
+++ b/test/fr/devinsy/statoolinfos/metrics/httperror/HttpErrorLogsTest.java
@@ -0,0 +1,204 @@
+/*
+ * Copyright (C) 2021-2024 Christian Pierre MOMON <christian@momon.org>
+ * 
+ * This file is part of StatoolInfos, simple key value database.
+ * 
+ * StatoolInfos is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ * 
+ * StatoolInfos is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with StatoolInfos.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package fr.devinsy.statoolinfos.metrics.httperror;
+
+import java.io.File;
+
+import org.apache.logging.log4j.Level;
+import org.apache.logging.log4j.core.config.Configurator;
+import org.apache.logging.log4j.core.config.DefaultConfiguration;
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import fr.devinsy.statoolinfos.core.Configuration;
+import fr.devinsy.statoolinfos.core.StatoolInfosException;
+import fr.devinsy.statoolinfos.metrics.PathCounters;
+import fr.devinsy.statoolinfos.metrics.Prober;
+import fr.devinsy.statoolinfos.metrics.httperrorlog.HttpErrorLog;
+import fr.devinsy.statoolinfos.metrics.httperrorlog.HttpErrorLogAnalyzer;
+import fr.devinsy.statoolinfos.metrics.httperrorlog.HttpErrorLogIterator;
+import fr.devinsy.statoolinfos.metrics.httperrorlog.HttpErrorLogs;
+import fr.devinsy.statoolinfos.util.Files;
+import fr.devinsy.statoolinfos.util.FilesUtils;
+
+/**
+ * The Class HttpErrorLogsTest.
+ */
+public class HttpErrorLogsTest
+{
+    private static org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(HttpErrorLogsTest.class);
+
+    /**
+     * Test 01.
+     *
+     * @throws Exception
+     *             the exception
+     */
+    @Test
+    public void test01() throws Exception
+    {
+        System.out.println(System.getProperty("user.dir"));
+
+        String source = "./test/fr/devinsy/statoolinfos/metrics/httperror/data/paste.libre-service.eu/paste*";
+        Files files = FilesUtils.searchByWildcard(source);
+        for (File file : files)
+        {
+            System.out.println(file);
+        }
+        HttpErrorLogs logs = new HttpErrorLogs(files);
+        HttpErrorLogIterator iterator = (HttpErrorLogIterator) logs.iterator();
+        while (iterator.hasNext())
+        {
+            HttpErrorLog log = iterator.next();
+            System.out.println(log.toStringLog());
+        }
+
+        // System.out.println(iterator.getLogCount());
+        // System.out.println(iterator.getFailedLogCount());
+
+        Assert.assertEquals(315, iterator.getLogCount());
+        Assert.assertEquals(0, iterator.getFailedLogCount());
+    }
+
+    /**
+     * Test 02.
+     *
+     * @throws Exception
+     *             the exception
+     */
+    @Test
+    public void test02() throws Exception
+    {
+        System.out.println(System.getProperty("user.dir"));
+
+        String source = "./test/fr/devinsy/statoolinfos/metrics/httperror/data/paste.libre-service.eu/paste*";
+        Files files = FilesUtils.searchByWildcard(source);
+        for (File file : files)
+        {
+            System.out.println(file);
+        }
+        HttpErrorLogs logs = new HttpErrorLogs(files);
+
+        PathCounters counters = HttpErrorLogAnalyzer.probe(logs);
+
+        for (String prefix : counters.getPrefixes())
+        {
+            System.out.println(prefix);
+
+        }
+
+        System.out.println("Prefix count: " + counters.getPrefixes().size());
+        System.out.println("metrics.http.errors.2023.months=" + counters.get("metrics.http.errors", "2023-08").getCounter());
+
+        Assert.assertEquals(2, counters.getPrefixes().size());
+        Assert.assertEquals(25, counters.getCount("metrics.http.errors", "2023-08"));
+    }
+
+    /**
+     * Test 03.
+     *
+     * @throws Exception
+     *             the exception
+     */
+    @Test
+    public void test03() throws Exception
+    {
+        System.out.println(System.getProperty("user.dir"));
+
+        Configuration configuration = new Configuration();
+        configuration.add("conf.probe.types", "HttpErrorLog");
+        configuration.add("conf.probe.httperrorlog.file", "./test/fr/devinsy/statoolinfos/metrics/httperror/data/paste.libre-service.eu/paste*");
+        // configuration.add("conf.probe.httperrorlog.pattern", "");
+        // configuration.add("conf.probe.httperrorlog.dateTimePattern", "");
+
+        PathCounters counters = Prober.probeHttpErrorLog(configuration);
+
+        // for (String counter : counters.keySet())
+        // {
+        // System.out.println(counter + " " +
+        // counters.get(counter).getCounter());
+        // }
+
+        Assert.assertEquals(660, counters.size());
+
+        //
+        Assert.assertEquals(210, counters.getCount("metrics.http.errors", "2023"));
+        Assert.assertEquals(16, counters.getCount("metrics.http.errors", "2023-10"));
+        Assert.assertEquals(7, counters.getCount("metrics.http.errors", "2023-W31"));
+        Assert.assertEquals(1, counters.getCount("metrics.http.errors", "2023-05-20"));
+        Assert.assertEquals(",21,19,23,26,23,22,25,10,16,9,16", counters.getMonthsValuesLine("metrics.http.errors", "2023"));
+        Assert.assertEquals(",,,,3,4,4,9,4,5,4,4,5,5,3,6,7,8,4,7,4,5,5,6,5,5,6,6,4,6,7,6,6,5,1,4,3,2,2,2,6,4,2,3,3,2,,4,3,5,2,4", counters.getWeeksValuesLine("metrics.http.errors", "2023"));
+
+        Assert.assertEquals(190, counters.getCount("metrics.http.errors.php", "2023"));
+        Assert.assertEquals(7, counters.getCount("metrics.http.errors", "2023-W31"));
+        Assert.assertEquals(22, counters.getCount("metrics.http.errors.php", "2023-07"));
+        Assert.assertEquals(",17,19,22,20,22,22,23,10,15,8,12", counters.getMonthsValuesLine("metrics.http.errors.php", "2023"));
+        Assert.assertEquals(",,,,3,3,4,6,4,5,4,4,5,5,3,6,6,4,3,7,3,5,5,6,4,5,6,6,4,6,6,5,6,5,1,4,3,2,2,2,5,4,2,3,3,1,,3,3,2,2,4", counters.getWeeksValuesLine("metrics.http.errors.php", "2023"));
+
+        //
+        Assert.assertEquals(105, counters.getCount("metrics.http.errors", "2024"));
+        Assert.assertEquals(19, counters.getCount("metrics.http.errors", "2024-02"));
+        Assert.assertEquals(7, counters.getCount("metrics.http.errors", "2024-W17"));
+        Assert.assertEquals(2, counters.getCount("metrics.http.errors", "2024-03-15"));
+
+        Assert.assertEquals("9,19,18,23,13,17,6", counters.getMonthsValuesLine("metrics.http.errors", "2024"));
+    }
+
+    @Test
+    public void test04() throws Exception
+    {
+        System.out.println(System.getProperty("user.dir"));
+
+        Configuration configuration = new Configuration();
+        configuration.add("conf.probe.types", "HttpErrorLog");
+        configuration.add("conf.probe.httperrorlog.file", "/home/cpm/Projets/StatoolInfos/EnvTest/logs/pastechaprilorg-error.log.gz");
+        // configuration.add("conf.probe.httperrorlog.pattern", "TODO");
+        // configuration.add("conf.probe.httperrorlog.dateTimePattern", "TODO");
+
+        PathCounters counters = Prober.probeHttpErrorLog(configuration);
+
+        Assert.assertEquals(84, counters.size());
+    }
+
+    /**
+     * After class.
+     * 
+     * @throws StatoolInfosException
+     *             the Juga exception
+     */
+    @AfterClass
+    public static void afterClass() throws StatoolInfosException
+    {
+    }
+
+    /**
+     * Before class.
+     * 
+     * @throws StatoolInfosException
+     *             the Juga exception
+     */
+    @BeforeClass
+    public static void beforeClass() throws StatoolInfosException
+    {
+        Configurator.initialize(new DefaultConfiguration());
+        Configurator.setRootLevel(Level.DEBUG);
+    }
+}