Index: /trunk/psphot/src/psphotMagnitudes.c
===================================================================
--- /trunk/psphot/src/psphotMagnitudes.c	(revision 23348)
+++ /trunk/psphot/src/psphotMagnitudes.c	(revision 23349)
@@ -36,5 +36,8 @@
 
     // the binning details are saved on the analysis metadata
-    psImageBinning *binning = psMetadataLookupPtr(&status, backModel->analysis, "PSPHOT.BACKGROUND.BINNING");
+    psImageBinning *binning = NULL;
+    if (backModel) {
+        binning = psMetadataLookupPtr(&status, backModel->analysis, "PSPHOT.BACKGROUND.BINNING");
+    }
 
     bool IGNORE_GROWTH = psMetadataLookupBool (&status, recipe, "IGNORE_GROWTH");