Index: trunk/psModules/src/detrend/pmMaskBadOverscan.c
===================================================================
--- trunk/psModules/src/detrend/pmMaskBadOverscan.c	(revision 43038)
+++ trunk/psModules/src/detrend/pmMaskBadOverscan.c	(revision 43049)
@@ -32,7 +32,7 @@
 
     // completely mask the readout
-    for (int i = 0; i < mask->numRows; i++) { // Loop over rows : note: problem with discontinuity here
-	for (int j = 0; j < mask->numCols; j++) { // Loop over columns
-	  mask->data.PS_TYPE_IMAGE_MASK_DATA[j][i] |= maskValue;
+    for (int iy = 0; iy < mask->numRows; iy++) { // Loop over rows : note: problem with discontinuity here
+	for (int ix = 0; ix < mask->numCols; ix++) { // Loop over columns
+	  mask->data.PS_TYPE_IMAGE_MASK_DATA[iy][ix] |= maskValue;
 	}
     }