Index: trunk/ppSub/src/ppSubReadout.c
===================================================================
--- trunk/ppSub/src/ppSubReadout.c	(revision 20611)
+++ trunk/ppSub/src/ppSubReadout.c	(revision 20615)
@@ -570,5 +570,6 @@
             pmReadout *photRO = pmFPAviewThisReadout(view, photFile->fpa); // Readout with the sources
             psArray *sources = psMetadataLookupPtr(NULL, photRO->analysis, "PSPHOT.SOURCES"); // Sources
-            psMetadataAddS32(stats, PS_LIST_TAIL, "NUM_SOURCES", 0, "Number of sources detected", sources->n);
+            psMetadataAddS32(stats, PS_LIST_TAIL, "NUM_SOURCES", 0, "Number of sources detected",
+                             sources ? sources->n : 0);
             psMetadataAddF32(stats, PS_LIST_TAIL, "TIME_PHOT", 0, "Time to do photometry",
                              psTimerClear("PPSUB_PHOT"));