Index: /trunk/psModules/src/objects/pmSourceMatch.c
===================================================================
--- /trunk/psModules/src/objects/pmSourceMatch.c	(revision 42478)
+++ /trunk/psModules/src/objects/pmSourceMatch.c	(revision 42479)
@@ -219,4 +219,7 @@
                                       sources); // Number of sources
 
+        // an input image with only poor detections can cause trouble, remove it
+        if (!numSources) continue;
+
         if (!boundsMaster) {
             // First run through --- can just copy