Index: trunk/ppSub/src/ppSub.c
===================================================================
--- trunk/ppSub/src/ppSub.c	(revision 18649)
+++ trunk/ppSub/src/ppSub.c	(revision 19119)
@@ -48,5 +48,5 @@
     if (!ppSubLoop(config)) {
         psErrorStackPrint(stderr, "Error performing subtraction.\n");
-        exitValue = PS_EXIT_PROG_ERROR;
+        exitValue = PS_EXIT_SYS_ERROR;
         goto die;
     }