Index: /trunk/ppMerge/src/ppMergeArguments.c
===================================================================
--- /trunk/ppMerge/src/ppMergeArguments.c	(revision 18602)
+++ /trunk/ppMerge/src/ppMergeArguments.c	(revision 18603)
@@ -162,5 +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-set-valud",0, "Value to set for output mask pixels", NULL);
+    psMetadataAddStr(arguments, PS_LIST_TAIL, "-mask-set-value",0, "Value to set for output mask pixels", NULL);
     psMetadataAddBool(arguments, PS_LIST_TAIL, "-mask-chip",    0, "Measure mask statistics by chip?", false);
 
@@ -211,33 +211,33 @@
       type = PPMERGE_TYPE_BIAS;
       goto VALID;
-    } 
+    }
     if (strcasecmp(typeStr, "DARK") == 0 ||
-	strcasecmp(typeStr, "DARK_PREMASK") == 0) {
+        strcasecmp(typeStr, "DARK_PREMASK") == 0) {
       type = PPMERGE_TYPE_DARK;
       goto VALID;
-    } 
-    if (strcasecmp(typeStr, "FLAT") == 0 || 
-	strcasecmp(typeStr, "DOMEFLAT") == 0 ||
-	strcasecmp(typeStr, "SKYFLAT") == 0 ||
-	strcasecmp(typeStr, "FLAT_PREMASK") == 0 ||
-	strcasecmp(typeStr, "SKYFLAT_PREMASK") == 0 ||
-	strcasecmp(typeStr, "DOMEFLAT_PREMASK") == 0) {
+    }
+    if (strcasecmp(typeStr, "FLAT") == 0 ||
+        strcasecmp(typeStr, "DOMEFLAT") == 0 ||
+        strcasecmp(typeStr, "SKYFLAT") == 0 ||
+        strcasecmp(typeStr, "FLAT_PREMASK") == 0 ||
+        strcasecmp(typeStr, "SKYFLAT_PREMASK") == 0 ||
+        strcasecmp(typeStr, "DOMEFLAT_PREMASK") == 0) {
       type = PPMERGE_TYPE_FLAT;
       goto VALID;
-    } 
+    }
     if (strcasecmp(typeStr, "FRINGE") == 0) {
       type = PPMERGE_TYPE_FRINGE;
       goto VALID;
-    } 
+    }
     if (strcasecmp(typeStr, "SHUTTER") == 0) {
       type = PPMERGE_TYPE_SHUTTER;
       goto VALID;
-    } 
+    }
     if (strcasecmp(typeStr, "MASK") == 0 ||
-	strcasecmp(typeStr, "DARKMASK") == 0 ||
-	strcasecmp(typeStr, "FLATMASK") == 0) {
+        strcasecmp(typeStr, "DARKMASK") == 0 ||
+        strcasecmp(typeStr, "FLATMASK") == 0) {
       type = PPMERGE_TYPE_MASK;
       goto VALID;
-    } 
+    }
     psError(PS_ERR_BAD_PARAMETER_VALUE, true, "Unrecognised image type: %s", typeStr);
     goto ERROR;