Index: trunk/ppStack/src/ppStackFiles.c
===================================================================
--- trunk/ppStack/src/ppStackFiles.c	(revision 26454)
+++ trunk/ppStack/src/ppStackFiles.c	(revision 27004)
@@ -115,16 +115,20 @@
     pmFPAview *view = pmFPAviewAlloc(0);// Pointer into FPA hierarchy
     if (!pmFPAfileIOChecks(config, view, PM_FPA_BEFORE)) {
+        psError(PPSTACK_ERR_IO, false, "File checks failed.");
         return NULL;
     }
     view->chip = 0;
     if (!pmFPAfileIOChecks(config, view, PM_FPA_BEFORE)) {
+        psError(PPSTACK_ERR_IO, false, "File checks failed.");
         return NULL;
     }
     view->cell = 0;
     if (!pmFPAfileIOChecks(config, view, PM_FPA_BEFORE)) {
+        psError(PPSTACK_ERR_IO, false, "File checks failed.");
         return NULL;
     }
     view->readout = 0;
     if (!pmFPAfileIOChecks(config, view, PM_FPA_BEFORE)) {
+        psError(PPSTACK_ERR_IO, false, "File checks failed.");
         return NULL;
     }
@@ -141,16 +145,20 @@
     view->chip = view->cell = view->readout = 0;
     if (!pmFPAfileIOChecks(config, view, PM_FPA_AFTER)) {
+        psError(PPSTACK_ERR_IO, false, "File checks failed.");
         return false;
     }
     view->readout = -1;
     if (!pmFPAfileIOChecks(config, view, PM_FPA_AFTER)) {
+        psError(PPSTACK_ERR_IO, false, "File checks failed.");
         return false;
     }
     view->cell = -1;
     if (!pmFPAfileIOChecks(config, view, PM_FPA_AFTER)) {
+        psError(PPSTACK_ERR_IO, false, "File checks failed.");
         return false;
     }
     view->chip = -1;
     if (!pmFPAfileIOChecks(config, view, PM_FPA_AFTER)) {
+        psError(PPSTACK_ERR_IO, false, "File checks failed.");
         return false;
     }
@@ -172,10 +180,10 @@
     psFits *fits = psFitsOpen(resolved, "w");
     if (!fits) {
-        psError(PS_ERR_IO, false, "Unable to open FITS file %s to write image.", resolved);
+        psError(PPSTACK_ERR_IO, false, "Unable to open FITS file %s to write image.", resolved);
         psFree(resolved);
         return false;
     }
     if (!psFitsWriteImage(fits, header, image, 0, NULL)) {
-        psError(PS_ERR_IO, false, "Unable to write FITS image %s.", resolved);
+        psError(PPSTACK_ERR_IO, false, "Unable to write FITS image %s.", resolved);
         psFitsClose(fits);
         psFree(resolved);
@@ -183,5 +191,5 @@
     }
     if (!psFitsClose(fits)) {
-        psError(PS_ERR_IO, false, "Unable to close FITS image %s.", resolved);
+        psError(PPSTACK_ERR_IO, false, "Unable to close FITS image %s.", resolved);
         psFree(resolved);
         return false;