Index: trunk/ppStack/src/ppStackCombineFinal.c
===================================================================
--- trunk/ppStack/src/ppStackCombineFinal.c	(revision 27696)
+++ trunk/ppStack/src/ppStackCombineFinal.c	(revision 27803)
@@ -142,5 +142,5 @@
         float exptime = 0.0;            // Summed exposure time
         for (int i = 0; i < options->num; i++) {
-            if (options->inputMask) {
+            if (options->inputMask->data.U8[i]) {
                 continue;
             }