Index: trunk/psphot/src/psphotExtendedSourceAnalysis.c
===================================================================
--- trunk/psphot/src/psphotExtendedSourceAnalysis.c	(revision 29027)
+++ trunk/psphot/src/psphotExtendedSourceAnalysis.c	(revision 29936)
@@ -22,6 +22,5 @@
     }
 
-    int num = psMetadataLookupS32 (&status, config->arguments, "PSPHOT.INPUT.NUM");
-    psAssert (status, "programming error: must define PSPHOT.INPUT.NUM");
+    int num = psphotFileruleCount(config, filerule);
 
     // loop over the available readouts