Index: trunk/psModules/src/imcombine/pmSubtractionThreads.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtractionThreads.c	(revision 21363)
+++ trunk/psModules/src/imcombine/pmSubtractionThreads.c	(revision 26893)
@@ -69,5 +69,5 @@
 
     {
-        psThreadTask *task = psThreadTaskAlloc("PSMODULES_SUBTRACTION_CALCULATE_EQUATION", 3);
+        psThreadTask *task = psThreadTaskAlloc("PSMODULES_SUBTRACTION_CALCULATE_EQUATION", 4);
         task->function = &pmSubtractionCalculateEquationThread;
         psThreadTaskAdd(task);