Index: trunk/ippScripts/scripts/warp_skycell.pl
===================================================================
--- trunk/ippScripts/scripts/warp_skycell.pl	(revision 19127)
+++ trunk/ippScripts/scripts/warp_skycell.pl	(revision 19138)
@@ -208,5 +208,7 @@
     # $accept is set above based on the fraction of lit pixels
     # XXX for some files, there may not be enough stars to find a good psf.  these should be dropped as well
-    $accept &= $ipprc->file_exists($outputPSF);
+    if ($accept && !$ipprc->file_exists($outputPSF)) { 
+	$accept = 0;
+    }
 
     if ($accept) {