Index: trunk/ppStack/src/ppStack.c
===================================================================
--- trunk/ppStack/src/ppStack.c	(revision 13464)
+++ trunk/ppStack/src/ppStack.c	(revision 14844)
@@ -30,4 +30,10 @@
     }
 
+    if (!pmModelClassInit()) {
+        psErrorStackPrint(stderr, "Error initialising model classes.\n");
+        exitValue = PS_EXIT_PROG_ERROR;
+        goto die;
+    }
+
     if (!ppStackCamera(config)) {
         psErrorStackPrint(stderr, "Error reading configuration.\n");