From b513684c725997c77341f30ce4e584cf9f7cdfed Mon Sep 17 00:00:00 2001
From: hansonr <hansonr@STO24954W.ad.stolaf.edu>
Date: Sun, 22 Jul 2018 17:27:03 -0500
Subject: [PATCH] allows for null Jmol viewer

---
 src/jalview/ext/jmol/JalviewJmolBinding.java |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/jalview/ext/jmol/JalviewJmolBinding.java b/src/jalview/ext/jmol/JalviewJmolBinding.java
index 8832278..258d806 100644
--- a/src/jalview/ext/jmol/JalviewJmolBinding.java
+++ b/src/jalview/ext/jmol/JalviewJmolBinding.java
@@ -166,7 +166,8 @@ public abstract class JalviewJmolBinding extends AAStructureBindingModel
   {
     // remove listeners for all structures in viewer
     getSsm().removeStructureViewerListener(this, this.getStructureFiles());
-    viewer.dispose();
+    if (viewer != null)
+      viewer.dispose();
     lastCommand = null;
     viewer = null;
     releaseUIResources();
-- 
1.7.10.2