Index: branches/pap/ppSub/src/ppSubReadoutPhotometry.c
===================================================================
--- branches/pap/ppSub/src/ppSubReadoutPhotometry.c	(revision 23948)
+++ branches/pap/ppSub/src/ppSubReadoutPhotometry.c	(revision 25027)
@@ -65,4 +65,7 @@
     // equivalent to the minuend image.
     pmReadout *inRO = pmFPAfileThisReadout(config->files, view, name); // Readout with image and sources
+    if (psMetadataLookup(inRO->analysis, "PSPHOT.SOURCES")) {
+        psMetadataRemoveKey(inRO->analysis, "PSPHOT.SOURCES");
+    }
 
     pmFPAfile *photFile = psMetadataLookupPtr(&mdok, config->files, "PSPHOT.INPUT"); // Photometry file
@@ -92,6 +95,11 @@
     }
 
+    // If no sources were found, there's no error,  but we want to trigger 'bad quality'
+    psArray *sources = psMetadataLookupPtr(NULL, photRO->analysis, "PSPHOT.SOURCES"); // Sources
+    if (!sources) {
+        ppSubDataQuality(data, PSPHOT_ERR_DATA, PPSUB_FILES_PHOT_SUB | PPSUB_FILES_PHOT_INV);
+    }
+
     if (data->stats) {
-        psArray *sources = psMetadataLookupPtr(NULL, photRO->analysis, "PSPHOT.SOURCES"); // Sources
         bool mdok;
         int numSources = psMetadataLookupS32(&mdok, data->stats, "NUM_SOURCES"); // Number of sources