Index: trunk/psphot/src/psphotModelBackground.c
===================================================================
--- trunk/psphot/src/psphotModelBackground.c	(revision 27657)
+++ trunk/psphot/src/psphotModelBackground.c	(revision 28013)
@@ -384,5 +384,5 @@
 
 // XXX supply filename or keep PSPHOT.INPUT fixed?
-bool psphotModelBackground (pmConfig *config, const pmFPAview *view)
+bool psphotModelBackground (pmConfig *config, const pmFPAview *view, const char *filerule)
 {
     bool status = false;
@@ -393,5 +393,5 @@
     // loop over the available readouts
     for (int i = 0; i < num; i++) {
-        if (!psphotModelBackgroundReadoutFileIndex(config, view, "PSPHOT.INPUT", i)) {
+        if (!psphotModelBackgroundReadoutFileIndex(config, view, filerule, i)) {
             psError (PSPHOT_ERR_CONFIG, false, "failed to model background for PSPHOT.INPUT entry %d", i);
             return false;