From 0c89682e53d785bd8a0dce3e2894fd5e69307adf Mon Sep 17 00:00:00 2001
From: tim <tim.vincent@appliedo.com>
Date: Thu, 28 Feb 2019 10:13:38 -0500
Subject: [PATCH] [occ] Only access face curvature if defined

---
 libsrc/occ/occgenmesh.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libsrc/occ/occgenmesh.cpp b/libsrc/occ/occgenmesh.cpp
index a341dd14..924c24c2 100644
--- a/libsrc/occ/occgenmesh.cpp
+++ b/libsrc/occ/occgenmesh.cpp
@@ -1101,7 +1101,9 @@ namespace netgen
               {
                 double s = s0 + j/(double) nsections * (s1-s0);
                 prop.SetParameter (s);
-                double curvature = prop.Curvature();
+                double curvature = 0;
+                if(prop.IsTangentDefined())
+                  curvature = prop.Curvature();
                 if(curvature> maxcur) maxcur = curvature;
 
                 if (curvature >= 1e99)