Index: trunk/MagicSoft/Mars/mhbase/MFillH.cc
===================================================================
--- trunk/MagicSoft/Mars/mhbase/MFillH.cc	(revision 5994)
+++ trunk/MagicSoft/Mars/mhbase/MFillH.cc	(revision 6240)
@@ -379,5 +379,10 @@
     fCanvas = 0;
     if (fDrawOption.Contains("same", TString::kIgnoreCase))
+    {
         fCanvas = fDisplay->GetCanvas(tabname);
+        if (!fCanvas)
+            *fLog << warn << "WARNING - 'same' option given, but no tab with name '" << tabname << "' found." << endl;
+    }
+
     if (!fCanvas)
         fCanvas = &fDisplay->AddTab(tabname);