Index: trunk/psphot/src/psphotParseCamera.c
===================================================================
--- trunk/psphot/src/psphotParseCamera.c	(revision 29936)
+++ trunk/psphot/src/psphotParseCamera.c	(revision 33690)
@@ -2,4 +2,6 @@
 
 // define the needed / desired I/O files
+
+
 bool psphotParseCamera (pmConfig *config) {
 
@@ -40,4 +42,11 @@
     }
 
+    pmFPAfileBindFromArgs (&status, input, config, "PSPHOT.EXPNUM", "EXPNUM");
+    if (!status) {
+        psError (PS_ERR_UNKNOWN, false, "failed to load find definition");
+        return NULL;
+    }
+
+
     // define the additional input/output files associated with psphot
     if (!psphotDefineFiles (config, input)) {