Index: trunk/ippTools/src/difftool.c
===================================================================
--- trunk/ippTools/src/difftool.c	(revision 26569)
+++ trunk/ippTools/src/difftool.c	(revision 26652)
@@ -1148,6 +1148,8 @@
     PXOPT_COPY_STR(config->args, warp1Where, "-warp_label", "warpRun.label", "==");
     PXOPT_COPY_STR(config->args, warp1Where, "-tess_id", "warpRun.tess_id", "==");
+    PXOPT_COPY_STR(config->args, warp1Where, "-data_group", "warpRun.data_group", "==");
     PXOPT_COPY_S64(config->args, warp2Where, "-warp_id", "warpRun.warp_id", "==");
     PXOPT_COPY_STR(config->args, warp2Where, "-tess_id", "warpRun.tess_id", "==");
+    PXOPT_COPY_STR(config->args, warp2Where, "-data_group", "warpRun.data_group", "==");
     PXOPT_COPY_STR(config->args, warp2Where, "-skycell_id", "warpSkyfile.skycell_id", "==");
     PXOPT_COPY_STR(config->args, warp2Where, "-warp_label", "warpRun.label", "==");
@@ -1363,4 +1365,6 @@
             return false;
         }
+
+
         psString filter = psMetadataLookupStr(&mdok, row, "filter");
         if (!mdok) {
Index: trunk/ippTools/src/difftoolConfig.c
===================================================================
--- trunk/ippTools/src/difftoolConfig.c	(revision 26569)
+++ trunk/ippTools/src/difftoolConfig.c	(revision 26652)
@@ -183,4 +183,5 @@
     psMetadataAddStr(definewarpstackArgs, PS_LIST_TAIL, "-stack_label", 0, "search by stack label", NULL);
     psMetadataAddStr(definewarpstackArgs, PS_LIST_TAIL, "-warp_label", 0, "search by warp label", NULL);
+    psMetadataAddStr(definewarpstackArgs, PS_LIST_TAIL, "-data_group", 0, "search by data_group", NULL);
     psMetadataAddF32(definewarpstackArgs, PS_LIST_TAIL, "-good_frac", 0, "minimum good fraction of skycell", NAN);
     psMetadataAddStr(definewarpstackArgs, PS_LIST_TAIL, "-set_workdir", 0, "define workdir (required)", NULL);