Index: trunk/ppSub/src/ppSubCamera.c
===================================================================
--- trunk/ppSub/src/ppSubCamera.c	(revision 26518)
+++ trunk/ppSub/src/ppSubCamera.c	(revision 26571)
@@ -299,5 +299,5 @@
 
     // Output subtraction kernel
-    pmFPAfile *kernel = defineCalcFile(config, output, "PPSUB.OUTPUT.KERNELS", PM_FPA_FILE_SUBKERNEL);
+    pmFPAfile *kernel = defineCalcFile(config, NULL, "PPSUB.OUTPUT.KERNELS", PM_FPA_FILE_SUBKERNEL);
     if (!kernel) {
         psError(PS_ERR_UNEXPECTED_NULL, false, "Unable to define file PPSUB.OUTPUT.KERNELS");