From 9630216f3e659575988ebe052af53c50424b2c53 Mon Sep 17 00:00:00 2001
From: Christopher Lueth <christopher.lueth@gmail.com>
Date: Wed, 13 Oct 2010 22:06:03 +0000
Subject: [PATCH] Fixed nan problem if m_normResid0 = 0.0 at line 965

---
 Cantera/src/numerics/NonlinearSolver.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Cantera/src/numerics/NonlinearSolver.cpp b/Cantera/src/numerics/NonlinearSolver.cpp
index 19faf2def..c816d3f2a 100644
--- a/Cantera/src/numerics/NonlinearSolver.cpp
+++ b/Cantera/src/numerics/NonlinearSolver.cpp
@@ -961,7 +961,12 @@ namespace Cantera {
 	 *  We aren't going to solve the system if we don't need to. Therefore, return an estimate
 	 *  of the next solution update based on the ratio of the residual reduction.
 	 */
-	s1 = s0 * m_normResidTrial / m_normResid0;
+	if (m_normResid0 > 0.0) {
+	  s1 = s0 * m_normResidTrial / m_normResid0;
+	}
+	else {
+	  s1 = 0;
+	}
 	if (m_normResidTrial < 1.0) {
 	  retnTrial = 3;
 	} else {