From 97df7d7f0c7871ce943059b4f55832648dbff319 Mon Sep 17 00:00:00 2001
From: Jim Procter <jprocter@issues.jalview.org>
Date: Thu, 29 Sep 2016 11:53:21 +0100
Subject: [PATCH] JAL-2236 fix: bail if no context available for subgroup

---
 src/jalview/schemes/TCoffeeColourScheme.java |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/jalview/schemes/TCoffeeColourScheme.java b/src/jalview/schemes/TCoffeeColourScheme.java
index 62f3a2e..2be51c2 100644
--- a/src/jalview/schemes/TCoffeeColourScheme.java
+++ b/src/jalview/schemes/TCoffeeColourScheme.java
@@ -86,6 +86,10 @@ public class TCoffeeColourScheme extends ResidueColourScheme
     seqMap = new IdentityHashMap<SequenceI, Color[]>();
     AnnotatedCollectionI alcontext = alignment instanceof AlignmentI ? alignment
             : alignment.getContext();
+    if (alcontext == null)
+    {
+      return;
+    }
     int w = 0;
     for (AlignmentAnnotation al : alcontext
             .findAnnotation(TCoffeeScoreFile.TCOFFEE_SCORE))
-- 
1.7.10.2