Index: trunk/ppMerge/src/ppMergeScaleZero.c
===================================================================
--- trunk/ppMerge/src/ppMergeScaleZero.c	(revision 18218)
+++ trunk/ppMerge/src/ppMergeScaleZero.c	(revision 18558)
@@ -21,6 +21,7 @@
     psStatsOptions meanStat = psMetadataLookupS32(NULL, config->arguments, "MEAN"); // Statistic for mean
     psStatsOptions stdevStat = psMetadataLookupS32(NULL, config->arguments, "STDEV"); // Statistic for stdev
-    psMaskType maskVal = psMetadataLookupU8(NULL, config->arguments, "MASKVAL"); // Value to mask
     int shutterSize = psMetadataLookupS32(NULL, config->arguments, "SHUTTER.SIZE"); // Size of shutter region
+
+    psMaskType maskVal = pmConfigMaskGet("MASK.VALUE", config); // Value to mask
 
     psVector *gains = NULL;             // Gains for each cell