Index: trunk/psModules/src/imcombine/pmSubtractionKernels.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtractionKernels.c	(revision 14305)
+++ trunk/psModules/src/imcombine/pmSubtractionKernels.c	(revision 14306)
@@ -411,4 +411,5 @@
     pmSubtractionKernels *kernels = pmSubtractionKernelsAlloc(num, PM_SUBTRACTION_KERNEL_GUNK,
                                                               size, spatialOrder); // The kernels
+    kernels->sigma = psVectorAlloc(num, PS_TYPE_F32);
     kernels->preCalc = psArrayAlloc(numGaussianVars * numSpatial);
     kernels->inner = numGaussianVars * numSpatial;