Index: /trunk/Ohana/src/addstar/src/addstar.c
===================================================================
--- /trunk/Ohana/src/addstar/src/addstar.c	(revision 13322)
+++ /trunk/Ohana/src/addstar/src/addstar.c	(revision 13323)
@@ -26,4 +26,8 @@
 
   sky = SkyTableLoadOptimal (CATDIR, SKY_TABLE, GSCFILE, SKY_DEPTH, VERBOSE);
+  if (sky == NULL) {
+      fprintf (stderr, "ERROR: unable to load sky table data\n");
+      exit (2);
+  }
   SkyTableSetFilenames (sky, CATDIR, "cpt");