Index: trunk/ppSub/src/ppSubCamera.c
===================================================================
--- trunk/ppSub/src/ppSubCamera.c	(revision 14808)
+++ trunk/ppSub/src/ppSubCamera.c	(revision 14809)
@@ -133,5 +133,5 @@
         return false;
     }
-    if (sources->type != PM_FPA_FILE_CMF) {
+    if (sources && sources->type != PM_FPA_FILE_CMF) {
         psError(PS_ERR_IO, true, "PPSUB.SOURCES is not of type CMF");
         return false;