diff --git a/src/MEDWrapper/MED_Factory.cxx b/src/MEDWrapper/MED_Factory.cxx
index 278838a0c..af7285801 100644
--- a/src/MEDWrapper/MED_Factory.cxx
+++ b/src/MEDWrapper/MED_Factory.cxx
@@ -196,13 +196,13 @@ namespace MED
     }
     med_int wantedMajor = MED_MAJOR_NUM;
     med_int wantedMinor = MED_MINOR_NUM;
-    if (isCreated)
+    // when non managed version of file is requested : ignore it and take the latest version
+    std::vector<int> versionsOK(GetMEDVersionsAppendCompatible());
+    bool isVersionRequestedOK(std::find(versionsOK.begin(),versionsOK.end(),theVersion)!=versionsOK.end());
+    if (isCreated && isVersionRequestedOK)
     {
-      if (theVersion > 0)
-      {
-        wantedMajor = theVersion/10;
-        wantedMinor = theVersion%10;
-      }
+      wantedMajor = theVersion/10;
+      wantedMinor = theVersion%10;
     }
     return new MED::TWrapper(fileName, true, wantedMajor, wantedMinor);
   }