Index: trunk/ppSub/src/ppSubArguments.c
===================================================================
--- trunk/ppSub/src/ppSubArguments.c	(revision 38709)
+++ trunk/ppSub/src/ppSubArguments.c	(revision 42295)
@@ -104,4 +104,5 @@
     psMetadataAddBool(arguments, PS_LIST_TAIL, "-visual", 0, "Show diagnostic plots", NULL);
     psMetadataAddBool(arguments, PS_LIST_TAIL, "-updatemode", 0, "update mode?", false);
+    psMetadataAddBool(arguments, PS_LIST_TAIL, "-require-subkernel", 0, "do not regenerate subkernel if missing?", false);
 
     if (argc == 1 || !psArgumentParse(arguments, &argc, argv) || argc != 2) {