Index: plugins/rt_topo/crbs_route.c
===================================================================
--- plugins/rt_topo/crbs_route.c	(revision 1374)
+++ plugins/rt_topo/crbs_route.c	(revision 1375)
@@ -174,6 +174,7 @@
 }
 */
 
+static int hop_cnt = 0;
 
 /* Attempt to create a grbs path segment from curr to pt:adir. If fails, return
    NULL. If succeeds, remove the path segment from the grbs context, add a
@@ -183,7 +184,6 @@
 	grbs_addr_t *froma, *toa;
 	grbs_2net_t *gtn = crbs->routing_tn;
 	grbs_detached_addr_t *res = NULL, dtmp;
-	static int hop_cnt = 0;
 	char tmp[128];
 
 	hop_cnt++;
@@ -480,6 +480,7 @@
 	lasta->user_data = NULL;
 	printf("GT 2net_new %s %f %f  from P%ld", ctn->tn->net->hdr.oid, rt_topo_cfg.wire_thick, rt_topo_cfg.wire_clr, first->pt->uid);
 	for(da = first->user_data; da != NULL; prev = da, da = da->user_data) {
+		hop_cnt++;
 		switch(da->user_long) {
 			case GRBS_ADIR_INC:         printf(" to P%ld", da->pt->uid); break;
 			case GRBS_ADIR_CONVEX_CCW:  printf(" ccw P%ld", da->pt->uid); break;
@@ -493,8 +494,14 @@
 			pa = na;
 			firsta = na;
 		}
-		else
-			fprintf(stderr, "Internal ERROR, TODO: failed to pre-realize the path (%s at P%ld)\n", ctn->tn->net->hdr.oid, da->pt->uid);
+		else {
+			if (hop_svg) {
+				char tmp[256];
+				sprintf(tmp, "3_GRBS_routfail_%d_h%d_b.svg", cnt_grbs, hop_cnt);
+				crbs_grbs_draw(crbs, tmp);
+			}
+			printf("Internal ERROR, TODO: failed to pre-realize the path (%s at P%ld) {%d}\n", ctn->tn->net->hdr.oid, da->pt->uid, hop_cnt);
+		}
 	}
 
 	printf("\n");