Index: trunk/psModules/src/imcombine/pmSubtractionKernels.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtractionKernels.c	(revision 16479)
+++ trunk/psModules/src/imcombine/pmSubtractionKernels.c	(revision 16607)
@@ -180,4 +180,6 @@
     kernels->bgOrder = 0;
     kernels->mode = mode;
+    kernels->numCols = 0;
+    kernels->numRows = 0;
     kernels->solution1 = NULL;
     kernels->solution2 = NULL;