Index: trunk/ippScripts/scripts/warp_overlap.pl
===================================================================
--- trunk/ippScripts/scripts/warp_overlap.pl	(revision 18562)
+++ trunk/ippScripts/scripts/warp_overlap.pl	(revision 19099)
@@ -116,4 +116,7 @@
     my $camRoot = $imfile->{cam_path_base};
     my $astromFile = $ipprc->filename($astromSource, $camRoot); # Astrometry file
+    if (!$astromFile) {
+	&my_die("Unable to determine the astrometry source", $warp_id, $PS_EXIT_DATA_ERROR);
+    }
 
     my @matchlist = get_overlaps($astromFile, $tess_dir_abs, $astromAccept); # List of overlaps