Index: trunk/ippTools/src/releasetoolConfig.c
===================================================================
--- trunk/ippTools/src/releasetoolConfig.c	(revision 35460)
+++ trunk/ippTools/src/releasetoolConfig.c	(revision 35470)
@@ -227,5 +227,5 @@
     psMetadataAddStr(listrelstackArgs,  PS_LIST_TAIL, "-tess_id", 0, "select by tess_id", NULL);
     psMetadataAddStr(listrelstackArgs,  PS_LIST_TAIL, "-skycell_id", 0, "select by skycell_id (LIKE comparision)", NULL);
-    psMetadataAddStr(listrelstackArgs,  PS_LIST_TAIL, "-stack_type", 0, "select by stack_type", NULL);
+    psMetadataAddStr(listrelstackArgs,  PS_LIST_TAIL, "-stack_type", PS_META_DUPLICATE_OK, "select by stack_type", NULL);
 
     psMetadataAddStr(listrelstackArgs,  PS_LIST_TAIL, "-stack_data_group", 0, "select by stackRun.data_group (LIKE comparison)", NULL);