Index: /tags/ipp-20120404/psphot/src/psphotStackImageLoop.c
===================================================================
--- /tags/ipp-20120404/psphot/src/psphotStackImageLoop.c	(revision 33731)
+++ /tags/ipp-20120404/psphot/src/psphotStackImageLoop.c	(revision 33732)
@@ -42,4 +42,5 @@
     // XXX for now, just load the full set of images up front except for EXPNUM which we defer
     pmFPAfileActivate (config->files, false, "PSPHOT.STACK.EXPNUM.RAW");
+    pmFPAfileActivate (config->files, false, "PSPHOT.STACK.EXPNUM.CNV");
     if (!pmFPAfileIOChecks (config, view, PM_FPA_BEFORE)) ESCAPE ("failed input for fpa in psphot.");