Index: trunk/psModules/src/imcombine/pmSubtractionMatch.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtractionMatch.c	(revision 31671)
+++ trunk/psModules/src/imcombine/pmSubtractionMatch.c	(revision 33089)
@@ -1091,5 +1091,5 @@
     }
 
-    if (!psThreadPoolWait(true)) {
+    if (!psThreadPoolWait(true, true)) {
 	psError(psErrorCodeLast(), false, "Error waiting for threads.");
 	psFree(models);