Index: trunk/psModules/src/imcombine/pmSubtractionStamps.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtractionStamps.c	(revision 15443)
+++ trunk/psModules/src/imcombine/pmSubtractionStamps.c	(revision 15745)
@@ -245,5 +245,5 @@
             psRegion *subRegion = stamps->regions->data[i]; // Sub-region of interest
             for (int y = subRegion->y0; y <= subRegion->y1 ; y++) {
-                for (int x = subRegion->x0; x <= subRegion->y1 ; x++) {
+                for (int x = subRegion->x0; x <= subRegion->x1 ; x++) {
                     if (checkStampMask(x, y, subMask, mode) && image->data.F32[y][x] > fluxStamp) {
                         fluxStamp = image->data.F32[y][x];