diff --git a/src/fr/devinsy/statoolinfos/crawl/Crawler.java b/src/fr/devinsy/statoolinfos/crawl/Crawler.java
index bd30884..04959d4 100644
--- a/src/fr/devinsy/statoolinfos/crawl/Crawler.java
+++ b/src/fr/devinsy/statoolinfos/crawl/Crawler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020 Christian Pierre MOMON <christian@momon.org>
+ * Copyright (C) 2020-2021 Christian Pierre MOMON <christian@momon.org>
  * 
  * This file is part of StatoolInfos, simple service statistics tool.
  * 
@@ -115,7 +115,7 @@ public class Crawler
                 try
                 {
                     URL subUrl = new URL(property.getValue());
-                    crawl(subUrl, cache);
+                    crawl(subUrl, cache, input.get("file.class"));
                 }
                 catch (java.net.MalformedURLException exception)
                 {
@@ -162,7 +162,7 @@ public class Crawler
      * @throws IOException
      *             Signals that an I/O exception has occurred.
      */
-    public static void crawl(final URL url, final CrawlCache cache) throws StatoolInfosException, IOException
+    public static void crawl(final URL url, final CrawlCache cache, final String parentFileClass) throws StatoolInfosException, IOException
     {
         logger.info("Crawling " + url);
 
@@ -190,25 +190,33 @@ public class Crawler
             cache.storeQuietly(properties.getURL("service.logo"));
 
             // Crawl subs.
-            PathProperties subs = properties.getByPrefix("subs");
-            for (PathProperty property : subs)
+            String fileClass = properties.get("file.class");
+            if (StringUtils.equalsIgnoreCase(fileClass, parentFileClass))
             {
-                if (StringUtils.isNotBlank(property.getValue()))
+                logger.warn("WARNING: file class same than parent for [{}]", url);
+            }
+            else
+            {
+                PathProperties subs = properties.getByPrefix("subs");
+                for (PathProperty property : subs)
                 {
-                    try
+                    if (StringUtils.isNotBlank(property.getValue()))
                     {
-                        URL subUrl = new URL(property.getValue());
-                        crawl(subUrl, cache);
-                    }
-                    catch (java.net.MalformedURLException exception)
-                    {
-                        logger.error("ERROR: subcrawl failed for [{}][{}][{}]: {}", url.toString(), property.getPath(), property.getValue(), exception.getMessage());
-                        exception.printStackTrace();
-                    }
-                    catch (java.net.ConnectException | FileNotFoundException exception)
-                    {
-                        logger.error("ERROR: subcrawl failed for [{}][{}][{}]: {}", url.toString(), property.getPath(), property.getValue(), exception.getMessage());
-                        exception.printStackTrace();
+                        try
+                        {
+                            URL subUrl = new URL(property.getValue());
+                            crawl(subUrl, cache, fileClass);
+                        }
+                        catch (java.net.MalformedURLException exception)
+                        {
+                            logger.error("ERROR: subcrawl failed for [{}][{}][{}]: {}", url.toString(), property.getPath(), property.getValue(), exception.getMessage());
+                            exception.printStackTrace();
+                        }
+                        catch (java.net.ConnectException | FileNotFoundException exception)
+                        {
+                            logger.error("ERROR: subcrawl failed for [{}][{}][{}]: {}", url.toString(), property.getPath(), property.getValue(), exception.getMessage());
+                            exception.printStackTrace();
+                        }
                     }
                 }
             }