Index: trunk/ppStack/src/ppStackCamera.c
===================================================================
--- trunk/ppStack/src/ppStackCamera.c	(revision 26076)
+++ trunk/ppStack/src/ppStackCamera.c	(revision 26898)
@@ -373,6 +373,6 @@
         psMetadataLookupBool(&mdok, config->arguments, "-photometry"); // perform photometry
     if (doPhotom) {
-        // This file, PSPHOT.INPUT, is just used as a carrier; output files (eg, PSPHOT.RESID) are defined by
-        // psphotDefineFiles
+        // This pmFPAfile, PSPHOT.INPUT, is just used as a carrier; output files (eg,
+        // PSPHOT.RESID) are defined by psphotDefineFiles
         pmFPAfile *psphotInput = pmFPAfileDefineFromFPA(config, output->fpa, 1, 1, "PSPHOT.INPUT");
         if (!psphotInput) {
@@ -380,4 +380,6 @@
             return false;
         }
+	// specify the number of psphot input images
+	psMetadataAddS32 (config->arguments, PS_LIST_TAIL, "PSPHOT.INPUT.NUM", PS_META_REPLACE, "number of inputs", 1);
 
         // Define associated psphot input/output files