Index: trunk/psModules/src/objects/pmPSFtry.c
===================================================================
--- trunk/psModules/src/objects/pmPSFtry.c	(revision 9730)
+++ trunk/psModules/src/objects/pmPSFtry.c	(revision 9770)
@@ -5,6 +5,6 @@
  *  @author EAM, IfA
  *
- *  @version $Revision: 1.21 $ $Name: not supported by cvs2svn $
- *  @date $Date: 2006-10-24 22:55:05 $
+ *  @version $Revision: 1.22 $ $Name: not supported by cvs2svn $
+ *  @date $Date: 2006-10-28 20:23:51 $
  *
  *  Copyright 2004 Maui High Performance Computing Center, University of Hawaii
@@ -111,4 +111,8 @@
         pmSource *source = psfTry->sources->data[i];
         pmModel  *model  = pmSourceModelGuess (source, psfTry->psf->type);
+        if (model == NULL) {
+            psError(PS_ERR_UNKNOWN, false, "failed to build model");
+            return NULL;
+        }
         x = source->peak->x;
         y = source->peak->y;