From c07a4c6389352239e029d04af1710f5e65e63f04 Mon Sep 17 00:00:00 2001
From: Jae Woo Park <triplepjw@gmail.com>
Date: Wed, 25 Jul 2018 12:11:00 -0500
Subject: [PATCH] quick fix for mep_direction = 0

---
 src/opt/optinfo.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/opt/optinfo.h b/src/opt/optinfo.h
index b36480580..c2378a5df 100644
--- a/src/opt/optinfo.h
+++ b/src/opt/optinfo.h
@@ -215,7 +215,7 @@ class OptInfo : public GradInfo {
       if (opttype_->is_mep()) {
         // parameters for MEP calculations (Gonzalez, Schlegel)
         mep_direction_ = idat->get<int>("mep_direction", 1);
-        if (hess_approx_)
+        if (hess_approx_ && mep_direction_ != 0)
           throw std::runtime_error("MEP calculation should be started with Hessian eigenvectors");
       } else {
         // initialize the values