--- calo/flight/CaloProfile/src/CaloProfile.cpp	2009/08/12 14:43:35	1.9
+++ calo/flight/CaloProfile/src/CaloProfile.cpp	2009/08/12 14:57:00	1.10
@@ -1003,6 +1003,10 @@
     printf(" ERROR, the input formula must contain \"t\"\n");
     return 0.;
   };
+  if ( tmax != tmax ){
+    printf(" ERROR, tmax is nan! \n");
+    return 0.;
+  };
   TString g=Form("%f",tmax);
   TString *ts= new TString("");
   ts->Prepend(s.Data());