Index: trunk/ppStack/src/ppStackFiles.c
===================================================================
--- trunk/ppStack/src/ppStackFiles.c	(revision 26076)
+++ trunk/ppStack/src/ppStackFiles.c	(revision 26104)
@@ -181,5 +181,9 @@
         return false;
     }
-    psFitsClose(fits);
+    if (!psFitsClose(fits)) {
+        psError(PS_ERR_IO, false, "Unable to close FITS image %s.", resolved);
+        psFree(resolved);
+        return false;
+    }
     psFree(resolved);
     return true;