Index: dlg.c
===================================================================
--- dlg.c	(revision 30413)
+++ dlg.c	(revision 30414)
@@ -410,7 +410,10 @@
 		cell[0] = rule->name;
 		cell[1] = pcb_strdup(pcb_conf_role_name(role));
 		cell[2] = *dis ? "YES" : "no";
-		cell[3] = pcb_strdup_printf("%.3fs", st->last_run_time);
+		if (st->run_cnt > 0)
+			cell[3] = pcb_strdup_printf("%.3fs", st->last_run_time);
+		else
+			cell[3] = "-";
 		pcb_dad_tree_append(attr, NULL, cell);
 	}