Index: trunk/ppMerge/src/ppMergeSetThreads.c
===================================================================
--- trunk/ppMerge/src/ppMergeSetThreads.c	(revision 19299)
+++ trunk/ppMerge/src/ppMergeSetThreads.c	(revision 21183)
@@ -29,5 +29,5 @@
     psScalar *maskVal           = job->args->data[4];
 
-    bool status = pmDarkCombine(outCell, fileGroup->readouts, iter->data.S32, rej->data.F32, maskVal->data.U8);
+    bool status = pmDarkCombine(outCell, fileGroup->readouts, iter->data.S32, rej->data.F32, maskVal->data.PS_TYPE_IMAGE_MASK_DATA);
 
     // after we are done, tell the I/O system that this file group is done
@@ -49,5 +49,5 @@
     psScalar *maskVal             = job->args->data[7];
 
-    bool status = pmShutterCorrectionGenerate(output, pattern, fileGroup->readouts, shutterRef->data.F32, data, iter->data.S32, rej->data.F32, maskVal->data.U8);
+    bool status = pmShutterCorrectionGenerate(output, pattern, fileGroup->readouts, shutterRef->data.F32, data, iter->data.S32, rej->data.F32, maskVal->data.PS_TYPE_IMAGE_MASK_DATA);
 
     // after we are done, tell the I/O system that this file group is done