Index: plugins/rt_topo/crbs_route.c
===================================================================
--- plugins/rt_topo/crbs_route.c	(revision 1405)
+++ plugins/rt_topo/crbs_route.c	(revision 1406)
@@ -187,7 +187,7 @@
 	char tmp[128];
 
 	hop_cnt++;
-	printf(" {%d} ", hop_cnt);
+	if (crbs_trace_ast) printf(" {%d} ", hop_cnt);
 
 	if (hop_svg) {
 		sprintf(tmp, "3_GRBS_routed_%d_h%d_a.svg", cnt_grbs, hop_cnt);
@@ -298,14 +298,14 @@
 /*printf("Neigh: %d / %d (dir: %d)\n", a->pt_idx, a->pts.used, a->grbs_idx);*/
 
 		if (pt == crbs->target->pt->user_data) { /* quick lane for reaching the target */
-			printf(" try from %s P%ld to TARGET P%ld", from_type, curr->pt->uid, pt->gpt->uid);
+			if (crbs_trace_ast) printf(" try from %s P%ld to TARGET P%ld", from_type, curr->pt->uid, pt->gpt->uid);
 			next = crbs_next_hop(crbs, curr, pt, GRBS_ADIR_INC);
 			if (next != NULL) {
 				a->pt_idx = a->pts.used; /* don't consider detours from the current node if target node can be reached directly */
-				printf(" -> ok\n");
+				if (crbs_trace_ast) printf(" -> ok\n");
 				return crbs->target;
 			}
-			printf(" -> failed\n");
+			if (crbs_trace_ast) printf(" -> failed\n");
 			a->pt_idx++;
 			continue;
 		}
@@ -312,7 +312,7 @@
 
 
 		while(a->grbs_idx < 4) {
-			printf(" try from %s P%ld to P%ld", from_type, curr->pt->uid, pt->gpt->uid);
+			if (crbs_trace_ast) printf(" try from %s P%ld to P%ld", from_type, curr->pt->uid, pt->gpt->uid);
 
 			if (crbs->disable_concave) {
 				if (a->grbs_idx < 2)
@@ -322,18 +322,18 @@
 			/* prefer concave over convex; order matters when reaching target: first
 			   valid solution will stop the search */
 			switch(a->grbs_idx) {
-				case 0: printf(" concave ccw"); next = crbs_next_hop(crbs, curr, pt, GRBS_ADIR_CONCAVE_CCW); break;
-				case 1: printf(" concave cw"); next = crbs_next_hop(crbs, curr, pt, GRBS_ADIR_CONCAVE_CW);  break;
-				case 2: printf(" convex ccw"); next = crbs_next_hop(crbs, curr, pt, GRBS_ADIR_CONVEX_CCW); break;
-				case 3: printf(" convex cw"); next = crbs_next_hop(crbs, curr, pt, GRBS_ADIR_CONVEX_CW); break;
+				case 0: if (crbs_trace_ast) printf(" concave ccw"); next = crbs_next_hop(crbs, curr, pt, GRBS_ADIR_CONCAVE_CCW); break;
+				case 1: if (crbs_trace_ast) printf(" concave cw"); next = crbs_next_hop(crbs, curr, pt, GRBS_ADIR_CONCAVE_CW);  break;
+				case 2: if (crbs_trace_ast) printf(" convex ccw"); next = crbs_next_hop(crbs, curr, pt, GRBS_ADIR_CONVEX_CCW); break;
+				case 3: if (crbs_trace_ast) printf(" convex cw"); next = crbs_next_hop(crbs, curr, pt, GRBS_ADIR_CONVEX_CW); break;
 			}
 
 			a->grbs_idx++;
 			if (next != NULL) {
-				printf(" -> ok\n");
+				if (crbs_trace_ast) printf(" -> ok\n");
 				return next;
 			}
-			printf(" -> failed\n");
+			if (crbs_trace_ast) printf(" -> failed\n");
 		}
 	}