Index: trunk/psModules/src/imcombine/pmSubtractionMatch.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtractionMatch.c	(revision 23989)
+++ trunk/psModules/src/imcombine/pmSubtractionMatch.c	(revision 24181)
@@ -432,10 +432,10 @@
             }
 
-            if (sources) {
+            if (stampsName && strlen(stampsName) > 0) {
+                stamps = pmSubtractionStampsSetFromFile(stampsName, ro1->image, subMask, region, size,
+                                                        footprint, stampSpacing, subMode);
+            } else if (sources) {
                 stamps = pmSubtractionStampsSetFromSources(sources, ro1->image, subMask, region, size,
                                                            footprint, stampSpacing, subMode);
-            } else if (stampsName && strlen(stampsName) > 0) {
-                stamps = pmSubtractionStampsSetFromFile(stampsName, ro1->image, subMask, region, size,
-                                                        footprint, stampSpacing, subMode);
             }