Index: trunk/psphot/src/psphotStackImageLoop.c
===================================================================
--- trunk/psphot/src/psphotStackImageLoop.c	(revision 28013)
+++ trunk/psphot/src/psphotStackImageLoop.c	(revision 29936)
@@ -105,11 +105,8 @@
 bool GetAstrometryFPA (pmConfig *config, pmFPAview *view) {
 
-    bool status = false;
-
     bool foundAstrometry = false;
     bool bilevelAstrometry = false;
 
-    int num = psMetadataLookupS32 (&status, config->arguments, "PSPHOT.INPUT.NUM");
-    psAssert (status, "programming error: must define PSPHOT.INPUT.NUM");
+    int num = psphotFileruleCount(config, "PSPHOT.INPUT");
 
     // loop over the available readouts
@@ -158,8 +155,5 @@
 bool GetAstrometryChip (pmConfig *config, pmFPAview *view, bool bilevelAstrometry) {
 
-    bool status = false;
-
-    int num = psMetadataLookupS32 (&status, config->arguments, "PSPHOT.INPUT.NUM");
-    psAssert (status, "programming error: must define PSPHOT.INPUT.NUM");
+    int num = psphotFileruleCount(config, "PSPHOT.INPUT");
 
     // loop over the available readouts
@@ -220,10 +214,7 @@
 bool SetAstrometryFPA (pmConfig *config, pmFPAview *view, bool bilevelAstrometry) {
 
-    bool status = false;
-
     if (!bilevelAstrometry) return true;
 
-    int num = psMetadataLookupS32 (&status, config->arguments, "PSPHOT.INPUT.NUM");
-    psAssert (status, "programming error: must define PSPHOT.INPUT.NUM");
+    int num = psphotFileruleCount(config, "PSPHOT.INPUT");
 
     // loop over the available readouts