Index: trunk/psModules/src/imcombine/pmSubtraction.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtraction.c	(revision 35455)
+++ trunk/psModules/src/imcombine/pmSubtraction.c	(revision 35771)
@@ -167,4 +167,9 @@
               break;
           }
+	case PM_SUBTRACTION_KERNEL_SIMPLE: {
+              solvedKernelPreCalc(kernel, kernels, 1.0, i);
+              break;
+	}	  
+	  
           case PM_SUBTRACTION_KERNEL_ISIS:
           case PM_SUBTRACTION_KERNEL_ISIS_RADIAL: