From e06398df596b49a7a5f76a4d54d6873ffa35572c Mon Sep 17 00:00:00 2001
From: Weiqun Zhang <weiqunzhang@lbl.gov>
Date: Tue, 6 Jun 2017 14:25:53 -0700
Subject: update python

---
 Source/WarpXEvolve.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'Source/WarpXEvolve.cpp')

diff --git a/Source/WarpXEvolve.cpp b/Source/WarpXEvolve.cpp
index 794b5aa4c..97d0e49e0 100644
--- a/Source/WarpXEvolve.cpp
+++ b/Source/WarpXEvolve.cpp
@@ -42,10 +42,9 @@ WarpX::Evolve (int numsteps)
         // Beyond one step, we have B^{n-1/2} and E^{n}.
         // Particles have p^{n-1/2} and x^{n}.
 
-        FillBoundaryB();
-
         if (is_synchronized) {
             // on first step, push E and X by 0.5*dt
+            FillBoundaryB();
             EvolveE(0.5*dt[0]);
             mypc->PushX(0.5*dt[0]);
             mypc->Redistribute();  // Redistribute particles
-- 
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