Index: trunk/psastro/src/psastroMosaicSetMatch.c
===================================================================
--- trunk/psastro/src/psastroMosaicSetMatch.c	(revision 26259)
+++ trunk/psastro/src/psastroMosaicSetMatch.c	(revision 41499)
@@ -76,5 +76,5 @@
 		    if (!unique) {
 			psLogMsg ("psastro", 3, "failed to generate a uniq set of matched sources\n");
-			return false;
+			return false; // this can only happen if alloc fails, not a data quality problem
 		    }
 		    psFree (matches);