Index: trunk/Ohana/src/uniphot/src/update_catalog_setphot.c
===================================================================
--- trunk/Ohana/src/uniphot/src/update_catalog_setphot.c	(revision 35423)
+++ trunk/Ohana/src/uniphot/src/update_catalog_setphot.c	(revision 35425)
@@ -17,4 +17,6 @@
 
       off_t id = index[idx];
+      if (id < 0) continue;
+
       float Mcal = image[id].Mcal;
       float dMcal = image[id].dMcal;