Index: trunk/ppMerge/src/ppMergeArguments.c
===================================================================
--- trunk/ppMerge/src/ppMergeArguments.c	(revision 18365)
+++ trunk/ppMerge/src/ppMergeArguments.c	(revision 18558)
@@ -138,5 +138,8 @@
     psMetadataAddS32(arguments, PS_LIST_TAIL, "-nkeep",    0, "Minimum number of pixels in stack to keep", 0);
     psMetadataAddBool(arguments, PS_LIST_TAIL, "-weights", 0, "Use image weights in combination?", false);
-    psMetadataAddStr(arguments, PS_LIST_TAIL, "-maskval",  0, "Mask value for input data", NULL);
+
+    // XXX EAM : not clear this should be allowed on the command line.
+    // psMetadataAddStr(arguments, PS_LIST_TAIL, "-maskval",  0, "Mask value for input data", NULL);
+
     psMetadataAddStr(arguments, PS_LIST_TAIL, "-combine",  0, "Statistic to use for combination", NULL);
     psMetadataAddStr(arguments, PS_LIST_TAIL, "-mean",     0, "Statistic to use to measure the mean", NULL);
@@ -159,5 +162,5 @@
     psMetadataAddStr(arguments, PS_LIST_TAIL, "-mask-mode",     0, "Mode to identify bad pixels", NULL);
     psMetadataAddS32(arguments, PS_LIST_TAIL, "-mask-grow",     0, "Number of pixels to grow final mask", 0);
-    psMetadataAddStr(arguments, PS_LIST_TAIL, "-mask-growval",  0, "Value to give grown mask pixels", NULL);
+    psMetadataAddStr(arguments, PS_LIST_TAIL, "-mask-set-valud",0, "Value to set for output mask pixels", NULL);
     psMetadataAddBool(arguments, PS_LIST_TAIL, "-mask-chip",    0, "Measure mask statistics by chip?", false);
 
@@ -264,5 +267,8 @@
     VALUE_ARG_RECIPE_INT("-nkeep",      "NKEEP",    S32, 0);
     VALUE_ARG_RECIPE_BOOL("-weights",   "WEIGHTS");
-    VALUE_ARG_RECIPE_MASK("-maskval",   "MASKVAL");
+
+    // XXX we do not supply this on the command line
+    // VALUE_ARG_RECIPE_MASK("-maskval",   "MASKVAL");
+
     VALUE_ARG_RECIPE_STAT("-combine",   "COMBINE");
     VALUE_ARG_RECIPE_STAT("-mean",      "MEAN");
@@ -281,6 +287,6 @@
     VALUE_ARG_RECIPE_FLOAT("-mask-suspect", "MASK.SUSPECT", F32);
     VALUE_ARG_RECIPE_FLOAT("-mask-bad",     "MASK.BAD",     F32);
-    VALUE_ARG_RECIPE_INT("-mask-grow",      "MASK.GROW",    S32, -1);
-    VALUE_ARG_RECIPE_MASK("-mask-growval",  "MASK.GROWVAL");
+    VALUE_ARG_RECIPE_INT("-mask-grow",      "MASK.GROW",    S32, 0);
+    VALUE_ARG_RECIPE_STR("-mask-set-value", "MASK.SET.VALUE");
     VALUE_ARG_RECIPE_BOOL("-mask-chip",     "MASK.CHIPSTATS");