Index: trunk/MagicSoft/Mars/mfbase/MF.cc
===================================================================
--- trunk/MagicSoft/Mars/mfbase/MF.cc	(revision 6869)
+++ trunk/MagicSoft/Mars/mfbase/MF.cc	(revision 6892)
@@ -477,10 +477,7 @@
 Int_t MF::ReadEnv(const TEnv &env, TString prefix, Bool_t print)
 {
-    Bool_t rc = kFALSE;
-    if (IsEnvDefined(env, prefix, "Inverted", print))
-    {
-        rc = kTRUE;
-        SetInverted(GetEnvValue(env, prefix, "Inverted", IsInverted()));
-    }
+    Bool_t rc = MFilter::ReadEnv(env, prefix, print);
+    if (rc==kERROR)
+        return kERROR;
 
     if (!IsEnvDefined(env, prefix, "Condition", print))