Index: trunk/ippTools/src/stacktoolConfig.c
===================================================================
--- trunk/ippTools/src/stacktoolConfig.c	(revision 33821)
+++ trunk/ippTools/src/stacktoolConfig.c	(revision 34296)
@@ -200,6 +200,6 @@
     psMetadataAddStr(sumskyfileArgs, PS_LIST_TAIL, "-exp_name", 0,          "search by exposure name", NULL);
 #endif
-    psMetadataAddStr(sumskyfileArgs, PS_LIST_TAIL, "-label", 0,             "search by stackRun.label", NULL);
-    psMetadataAddStr(sumskyfileArgs, PS_LIST_TAIL, "-data_group", 0,        "search by stackRun.data_group (LIKE comparison)", NULL);
+    psMetadataAddStr(sumskyfileArgs, PS_LIST_TAIL, "-label", PS_META_DUPLICATE_OK,             "search by stackRun.label", NULL);
+    psMetadataAddStr(sumskyfileArgs, PS_LIST_TAIL, "-data_group", PS_META_DUPLICATE_OK,        "search by stackRun.data_group (LIKE comparison)", NULL);
     psMetadataAddStr(sumskyfileArgs, PS_LIST_TAIL, "-filter", 0,            "search by filter (LIKE comparison)", NULL);
     psMetadataAddF64(sumskyfileArgs, PS_LIST_TAIL, "-mjd_obs_begin",  0,      "search by mjd_obs (average mjd_obs of inputs <=)", NAN);