Index: trunk/psModules/src/objects/pmSourceIO.c
===================================================================
--- trunk/psModules/src/objects/pmSourceIO.c	(revision 34720)
+++ trunk/psModules/src/objects/pmSourceIO.c	(revision 35560)
@@ -980,4 +980,5 @@
 	    return false;
         }
+
         // if this is not TRUE, the output files only contain the psf measurements.
         bool XSRC_OUTPUT = psMetadataLookupBool(&status, recipe, "EXTENDED_SOURCE_ANALYSIS");
@@ -1005,4 +1006,15 @@
             hdu->header = psFitsReadHeader (NULL, file->fits);
         }
+
+	// "WCS" is CMF without detected objects
+	if (file->type == PM_FPA_FILE_WCS) {
+	  psTrace("psModules.objects", 6, "read CMF table from %s : %s : %s", file->filename, headname, dataname);
+	  psFree (headname);
+	  psFree (dataname);
+	  psFree (deteffname);
+	  break;
+	}
+
+	// EXTDATA is the PSF data associated with this image header
 
         // we need to find the corresponding table EXTNAME.
@@ -1126,7 +1138,8 @@
     readout->data_exists = true;
 
+    // if we have a prior set of detections on this readout, we will replace them here
     pmDetections *detections = pmDetectionsAlloc();
     detections->allSources = sources;
-    status = psMetadataAdd (readout->analysis, PS_LIST_TAIL, "PSPHOT.DETECTIONS", PS_DATA_ARRAY, "input sources", detections);
+    status = psMetadataAdd (readout->analysis, PS_LIST_TAIL, "PSPHOT.DETECTIONS", PS_DATA_ARRAY | PS_META_REPLACE, "input sources", detections);
     psFree (detections);
     return true;