Index: trunk/psphot/src/psphotImageLoop.c
===================================================================
--- trunk/psphot/src/psphotImageLoop.c	(revision 15942)
+++ trunk/psphot/src/psphotImageLoop.c	(revision 20769)
@@ -72,4 +72,14 @@
 		}
 	    }
+
+	    status = true;
+	    status &= pmFPAfileDropInternal (config->files, "PSPHOT.BACKMDL");
+	    status &= pmFPAfileDropInternal (config->files, "PSPHOT.BACKMDL.STDEV");
+	    status &= pmFPAfileDropInternal (config->files, "PSPHOT.BACKGND");
+	    if (!status) {
+		psError(PSPHOT_ERR_PROG, false, "trouble dropping internal files");
+		psFree (view);
+		return false;
+	    }
 	}