Index: /trunk/psModules/src/imcombine/pmSubtractionMatch.c
===================================================================
--- /trunk/psModules/src/imcombine/pmSubtractionMatch.c	(revision 17363)
+++ /trunk/psModules/src/imcombine/pmSubtractionMatch.c	(revision 17364)
@@ -627,5 +627,5 @@
         int width2 = subtractionOrderWidth(stamp->image2, bg2, stamps->footprint, &models, &modelSums);
 
-        if (width1 == -1 || width2 == -2) {
+        if (width1 == 0 || width2 == 0) {
             ratios->data.F32[i] = NAN;
             mask->data.PS_TYPE_MASK_DATA[i] = 0xff;