Index: /branches/bills_branches/bills_201312/psModules/src/objects/pmModelClass.c
===================================================================
--- /branches/bills_branches/bills_201312/psModules/src/objects/pmModelClass.c	(revision 36423)
+++ /branches/bills_branches/bills_201312/psModules/src/objects/pmModelClass.c	(revision 36424)
@@ -265,7 +265,7 @@
         }
     } else {
-        // no lookup table defined, if inputType refers to a defined model, return it
-        // for backwards compatability
-        if (pmModelClassGetName(inputType)) {
+        // no lookup table defined
+        // for backwards compatability if inputType refers to a defined model, return it
+        if (inputType >= 0 && pmModelClassGetName(inputType)) {
             localType = inputType;
         }