Index: trunk/psModules/src/imcombine/pmSubtractionKernels.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtractionKernels.c	(revision 24296)
+++ trunk/psModules/src/imcombine/pmSubtractionKernels.c	(revision 25101)
@@ -765,2 +765,33 @@
     return PM_SUBTRACTION_KERNEL_NONE;
 }
+
+pmSubtractionKernels *pmSubtractionKernelsCopy(const pmSubtractionKernels *in)
+{
+    PM_ASSERT_SUBTRACTION_KERNELS_NON_NULL(in, NULL);
+
+    pmSubtractionKernels *out = psAlloc(sizeof(pmSubtractionKernels)); // Kernels, to return
+    psMemSetDeallocator(out, (psFreeFunc)subtractionKernelsFree);
+
+    out->type = in->type;
+    out->description = in->description;
+    out->num = in->num;
+    out->u = psMemIncrRefCounter(in->u);
+    out->v = psMemIncrRefCounter(in->v);
+    out->widths = psMemIncrRefCounter(in->widths);
+    out->preCalc = psMemIncrRefCounter(in->preCalc);
+    out->penalty = in->penalty;
+    out->penalties = psMemIncrRefCounter(in->penalties);
+    out->uStop = psMemIncrRefCounter(in->uStop);
+    out->vStop = psMemIncrRefCounter(in->vStop);
+    out->size = in->size;
+    out->inner = in->inner;
+    out->spatialOrder = in->spatialOrder;
+    out->bgOrder = in->bgOrder;
+    out->mode = in->mode;
+    out->numCols = in->numCols;
+    out->numRows = in->numRows;
+    out->solution1 = in->solution1 ? psVectorCopy(NULL, in->solution1, PS_TYPE_F64) : NULL;
+    out->solution2 = in->solution2 ? psVectorCopy(NULL, in->solution2, PS_TYPE_F64) : NULL;
+
+    return out;
+}