Index: trunk/MagicSoft/Mars/mdata/MDataPhrase.cc
===================================================================
--- trunk/MagicSoft/Mars/mdata/MDataPhrase.cc	(revision 8149)
+++ trunk/MagicSoft/Mars/mdata/MDataPhrase.cc	(revision 8274)
@@ -519,4 +519,10 @@
 Bool_t MDataPhrase::PreProcess(const MParList *plist)
 {
+    if (!fFormula)
+    {
+        *fLog << err << "Error - So far no valid phrase was setup." << endl;
+        return kFALSE;
+    }
+
     TIter Next(&fMembers);