X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fdatamodel%2FAlignment.java;h=73ccdc53966e03e5303dabfa0072ed0cea2350e9;hb=refs%2Fheads%2Fbug%2FJAL-2934proportionalScrolling;hp=514a32662fdf2318a146249c0c9346daf7e01c0f;hpb=80b889f0cca49103e1b20ed806755a0719789906;p=jalview.git

diff --git a/src/jalview/datamodel/Alignment.java b/src/jalview/datamodel/Alignment.java
index 514a326..73ccdc5 100755
--- a/src/jalview/datamodel/Alignment.java
+++ b/src/jalview/datamodel/Alignment.java
@@ -2057,7 +2057,7 @@ public class Alignment implements AlignmentI, AutoCloseable
     if (cm == null && _aa.sequenceRef != null)
     {
       cm = _aa.sequenceRef.getContactMatrixFor(_aa);
-      if (cm == null)
+      if (cm == null && _aa.sequenceRef.getDatasetSequence() != null)
       {
         // TODO fix up this logic and unify with getContactListFor
         cm = _aa.sequenceRef.getDatasetSequence().getContactMatrixFor(_aa);
@@ -2069,6 +2069,11 @@ public class Alignment implements AlignmentI, AutoCloseable
   @Override
   public ContactListI getContactListFor(AlignmentAnnotation _aa, int column)
   {
+    if (_aa.annotations == null || column >= _aa.annotations.length
+            || column < 0)
+    {
+      return null;
+    }
     ContactListI cl = cmholder.getContactListFor(_aa, column);
     if (cl == null && _aa.groupRef != null)
     {