Index: /trunk/ppStack/src/ppStackMatch.c
===================================================================
--- /trunk/ppStack/src/ppStackMatch.c	(revision 14838)
+++ /trunk/ppStack/src/ppStackMatch.c	(revision 14839)
@@ -52,5 +52,8 @@
     }
 
-    psArray *sources = psMetadataLookupPtr(&mdok, sourcesRO->analysis, "PSPHOT.SOURCES"); // Sources in image
+    psArray *sources = NULL;            // Sources in image
+    if (sourcesRO->analysis) {
+        sources = psMetadataLookupPtr(&mdok, sourcesRO->analysis, "PSPHOT.SOURCES");
+    }
 
     // Do the image matching