Index: trunk/ippTools/src/difftool.c
===================================================================
--- trunk/ippTools/src/difftool.c	(revision 25567)
+++ trunk/ippTools/src/difftool.c	(revision 25571)
@@ -572,5 +572,5 @@
     psMetadata *where = psMetadataAlloc();
     PXOPT_COPY_S64(config->args, where,  "-diff_id", "diffRun.diff_id", "==");
-    PXOPT_COPY_STR(config->args, where, "-label", "diffRun.label", "==");
+    pxAddLabelSearchArgs (config, where, "-label", "diffRun.label", "==");
 
     PXOPT_LOOKUP_U64(limit, config->args, "-limit", false, false);
Index: trunk/ippTools/src/difftoolConfig.c
===================================================================
--- trunk/ippTools/src/difftoolConfig.c	(revision 25567)
+++ trunk/ippTools/src/difftoolConfig.c	(revision 25571)
@@ -118,5 +118,5 @@
     psMetadata *advanceArgs = psMetadataAlloc();
     psMetadataAddS64(advanceArgs, PS_LIST_TAIL, "-diff_id", 0, "select by diff ID", 0);
-    psMetadataAddStr(advanceArgs, PS_LIST_TAIL, "-label", 0, "select by label", NULL);
+    psMetadataAddStr(advanceArgs, PS_LIST_TAIL, "-label", PS_META_DUPLICATE_OK, "select by label", NULL);
     psMetadataAddS32(advanceArgs, PS_LIST_TAIL, "-limit", 0, "limit number of results", 0);