Index: trunk/psModules/src/objects/pmSource.c
===================================================================
--- trunk/psModules/src/objects/pmSource.c	(revision 36860)
+++ trunk/psModules/src/objects/pmSource.c	(revision 37321)
@@ -176,4 +176,7 @@
     source->parent = NULL;
     source->tmpPtr = NULL;
+    source->chipNum = -1;
+    source->chipX = -1000;
+    source->chipY = -1000;
     source->imageID = -1;
     source->nFrames = 0;