From 1f68dadfe169ebcd7641f4506372b2d1715b9586 Mon Sep 17 00:00:00 2001
From: Yosuke Matsusaka <yosuke.matsusaka@gmail.com>
Date: Fri, 8 Jan 2016 16:35:15 +0900
Subject: [PATCH] add detailed error message when link is reduced by gz command
 (ref #47)

---
 simtrans/cli.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/simtrans/cli.py b/simtrans/cli.py
index 683dd8e..581a1c3 100644
--- a/simtrans/cli.py
+++ b/simtrans/cli.py
@@ -184,7 +184,7 @@ def main():
         m = nm
         
     if len(m.links) == 0:
-        logging.error("cannot read links at all (probably the model refers to another model by <include> tag)")
+        logging.error("cannot read links at all (probably the model refers to another model by <include> tag or <link> tag contains no <inertial> or <visual> or <collision> item and reduced by simulation optimization process of gz command used inside simtrans)")
         return 1
 
     if meshoutput: