Index: trunk/ppTranslate/src/ppMopsRead.c
===================================================================
--- trunk/ppTranslate/src/ppMopsRead.c	(revision 26266)
+++ trunk/ppTranslate/src/ppMopsRead.c	(revision 26561)
@@ -83,4 +83,5 @@
             psU32 flags = psMetadataLookupU32(NULL, row, "FLAGS");
             if (flags & SOURCE_MASK) {
+                psTrace("ppMops.read", 10, "Discarding row %ld from input %d because of flags: %ud", j, i, flags);
                 continue;
             }
@@ -111,6 +112,13 @@
                 !isfinite(det->ra->data.F64[numGood]) || !isfinite(det->dec->data.F64[numGood]) ||
                 !isfinite(det->mag->data.F32[numGood]) || !isfinite(det->magErr->data.F32[numGood]) ||
-                !isfinite(xErr) || !isfinite(yErr) || !isfinite(scale) || !isfinite(angle) ||
-                (det->flags->data.U32[numGood] & SOURCE_MASK)) {
+                !isfinite(xErr) || !isfinite(yErr) || !isfinite(scale) || !isfinite(angle)) {
+                psTrace("ppMops.read", 10,
+                        "Discarding row %ld from input %d because of non-finite values: "
+                        "%f %f %lf %lf %f %f %f %f %f %f",
+                        j, i,
+                        det->x->data.F32[numGood], det->y->data.F32[numGood],
+                        det->ra->data.F64[numGood], det->dec->data.F64[numGood],
+                        det->mag->data.F32[numGood], det->magErr->data.F32[numGood],
+                        xErr, yErr, scale, angle);
                 continue;
             }