Index: trunk/ippTools/src/stacktool.c
===================================================================
--- trunk/ippTools/src/stacktool.c	(revision 24659)
+++ trunk/ippTools/src/stacktool.c	(revision 24660)
@@ -142,5 +142,5 @@
     PXOPT_COPY_F32(config->args,  where, "-select_good_frac_min",      "warpSkyfile.good_frac", ">=");
     PXOPT_COPY_STR(config->args,  where, "-select_skycell_id",         "warpSkyfile.skycell_id", "==");
-    PXOPT_COPY_STR(config->args,  where, "-select_label",              "warpRun.label", "==");
+    pxAddLabelSearchArgs (config, where, "-select_label",              "warpRun.label", "LIKE");
 
     // these are used to build the HAVING restriction
Index: trunk/ippTools/src/stacktoolConfig.c
===================================================================
--- trunk/ippTools/src/stacktoolConfig.c	(revision 24659)
+++ trunk/ippTools/src/stacktoolConfig.c	(revision 24660)
@@ -55,5 +55,5 @@
     psMetadataAddF32(definebyqueryArgs, PS_LIST_TAIL, "-select_good_frac_min", 0, "define min good_frac", 0.0);
     psMetadataAddStr(definebyqueryArgs, PS_LIST_TAIL, "-select_exp_type", 0, "search for exp_type", "object");
-    psMetadataAddStr(definebyqueryArgs, PS_LIST_TAIL, "-select_label", 0, "search for label", NULL);
+    psMetadataAddStr(definebyqueryArgs, PS_LIST_TAIL, "-select_label", PS_META_DUPLICATE_OK, "search by warpRun label (LIKE comparison, multiple OK)", NULL);
     psMetadataAddStr(definebyqueryArgs, PS_LIST_TAIL, "-select_inst", 0, "search for camera", NULL);
     psMetadataAddStr(definebyqueryArgs, PS_LIST_TAIL, "-select_telescope", 0, "search for telescope", NULL);