diff --git a/installation/symlink_Processing.py b/installation/symlink_Processing.py
index 6a54e9765..0419c6ac8 100755
--- a/installation/symlink_Processing.py
+++ b/installation/symlink_Processing.py
@@ -26,12 +26,13 @@ bin_link = ['pre','post','misc']
 for myDir in bin_link:
   myDir = os.path.abspath(os.path.join(baseDir,myDir))
   for myFile in os.listdir(myDir):
-    src = os.path.abspath(os.path.join(myDir,myFile))
-    sym_link = os.path.abspath(os.path.join(binDir,os.path.splitext(myFile)[0]))
-    print sym_link,'-->',src
-    if os.path.lexists(sym_link):
-      os.remove(sym_link)    
-    os.symlink(src,sym_link)            
+    if os.path.splitext(myFile)[1] in ['.py']:                                                       #only link to know extension, otherwise .py.bak or somethink like that is uses
+      src = os.path.abspath(os.path.join(myDir,myFile))
+      sym_link = os.path.abspath(os.path.join(binDir,os.path.splitext(myFile)[0]))
+      print sym_link,'-->',src
+      if os.path.lexists(sym_link):
+        os.remove(sym_link)    
+      os.symlink(src,sym_link)