Index: trunk/psModules/src/imcombine/pmSubtractionThreads.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtractionThreads.c	(revision 19059)
+++ trunk/psModules/src/imcombine/pmSubtractionThreads.c	(revision 19340)
@@ -50,5 +50,5 @@
 }
 
-void pmSubtractionThreadsInit(pmReadout *out1, pmReadout *out2, pmReadout *in1, pmReadout *in2)
+void pmSubtractionThreadsInit(pmReadout *in1, pmReadout *in2)
 {
     if (threaded) {
@@ -58,6 +58,4 @@
     threaded = true;
 
-    subtractionMutexInit(out1);
-    subtractionMutexInit(out2);
     subtractionMutexInit(in1);
     subtractionMutexInit(in2);
@@ -88,5 +86,5 @@
 
 
-void pmSubtractionThreadsFinalize(pmReadout *out1, pmReadout *out2, pmReadout *in1, pmReadout *in2)
+void pmSubtractionThreadsFinalize(pmReadout *in1, pmReadout *in2)
 {
     if (!threaded) {
@@ -99,6 +97,4 @@
     psThreadTaskRemove("PSMODULES_SUBTRACTION_CONVOLVE");
 
-    subtractionMutexDestroy(out1);
-    subtractionMutexDestroy(out2);
     subtractionMutexDestroy(in1);
     subtractionMutexDestroy(in1);