Index: branches/pap/pswarp/src/pswarpLoop.c
===================================================================
--- branches/pap/pswarp/src/pswarpLoop.c	(revision 23511)
+++ branches/pap/pswarp/src/pswarpLoop.c	(revision 23580)
@@ -142,4 +142,5 @@
         psFree(resolved);
         stats = psMetadataAlloc();
+        psMetadataAddS32(stats, PS_LIST_TAIL, "QUALITY", 0, "No problems", 0);
     }
 
@@ -364,6 +365,6 @@
     fileActivation(config, independentFiles, false);
 
-    // We need a new PSF model for the warped frame.  It would be good to generate this analytically, but that's going to be tricky.
-    // We have a list of sources, so we use those to redetermine the PSF model.
+    // We need a new PSF model for the warped frame.  It would be good to generate this analytically, but
+    // that's going to be tricky.  We have a list of sources, so we use those to redetermine the PSF model.
 
     if (psMetadataLookupBool(&mdok, config->arguments, "PSF")) {
@@ -394,6 +395,14 @@
         // measure the PSF using these sources
         if (!psphotReadoutFindPSF(config, view, sources)) {
-            psError(PS_ERR_UNKNOWN, false, "Unable to determine PSF for warped image.");
-            return false;
+            // This is likely a data quality issue
+            // XXX Split into multiple cases using error codes?
+            psErrorStackPrint("Unable to determine PSF");
+            psWarning("Unable to determine PSF --- suspect bad data quality.");
+            if (stats && psMetadataLookupS32(NULL, stats, "QUALITY") == 0) {
+                psMetadataAddS32(stats, PS_LIST_TAIL, "QUALITY", PS_META_REPLACE,
+                                 "Unable to determine PSF", psErrorCodeLast());
+            }
+            psErrorClear();
+            psphotFilesActivate(config, false);
         }