X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fdatamodel%2FAlignment.java;h=41488ea9001f6df106e9f9771b9c8a71c1203dad;hb=bc096ecbcd3cf4bbf17a24f9e9df88806789d688;hp=db6195a6d6d1352479f4abf44660bc591b0402a0;hpb=6d183feafe3e566501af586286bbd1d2107ee5a9;p=jalview.git

diff --git a/src/jalview/datamodel/Alignment.java b/src/jalview/datamodel/Alignment.java
index db6195a..41488ea 100755
--- a/src/jalview/datamodel/Alignment.java
+++ b/src/jalview/datamodel/Alignment.java
@@ -338,15 +338,18 @@ public class Alignment implements AlignmentI
   @Override
   public void deleteSequence(SequenceI s)
   {
-    deleteSequence(findIndex(s));
+    synchronized (sequences)
+    {
+      deleteSequence(findIndex(s));
+    }
   }
 
   @Override
   public void deleteSequence(int i)
   {
-    if (i > -1 && i < getHeight())
+    synchronized (sequences)
     {
-      synchronized (sequences)
+      if (i > -1 && i < getHeight())
       {
         sequences.remove(i);
         hiddenSequences.adjustHeightSequenceDeleted(i);
@@ -357,9 +360,9 @@ public class Alignment implements AlignmentI
   @Override
   public void deleteHiddenSequence(int i)
   {
-    if (i > -1 && i < getHeight())
+    synchronized (sequences)
     {
-      synchronized (sequences)
+      if (i > -1 && i < getHeight())
       {
         sequences.remove(i);
       }