Index: /branches/eam_branches/20090715/psphot/src/psphotGuessModels.c
===================================================================
--- /branches/eam_branches/20090715/psphot/src/psphotGuessModels.c	(revision 25531)
+++ /branches/eam_branches/20090715/psphot/src/psphotGuessModels.c	(revision 25532)
@@ -177,4 +177,5 @@
 
 	// set the source PSF model
+	psAssert (source->modelPSF == NULL, "failed to free one of the models?");
 	source->modelPSF = modelPSF;
 	source->modelPSF->residuals = psf->residuals;