Index: trunk/psModules/src/objects/pmSourceFitSet.c
===================================================================
--- trunk/psModules/src/objects/pmSourceFitSet.c	(revision 36085)
+++ trunk/psModules/src/objects/pmSourceFitSet.c	(revision 36375)
@@ -352,5 +352,11 @@
         // set the model success or failure status
         model->flags |= PM_MODEL_STATUS_FITTED;
-        if (!fitStatus) model->flags |= PM_MODEL_STATUS_NONCONVERGE;
+	if (!fitStatus) {
+	  if (isnan(myMin->value)) {
+	    model->flags |= PM_MODEL_STATUS_NAN_CHISQ;
+	  } else {
+	    model->flags |= PM_MODEL_STATUS_NONCONVERGE;
+	  }
+	}
 
         // models can go insane: reject these