X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;ds=sidebyside;f=src%2Fjalview%2Fcommands%2FEditCommand.java;fp=src%2Fjalview%2Fcommands%2FEditCommand.java;h=a8aa8860e1b6c23e6c6196b46908e71ed3856c2f;hb=d6509fcf3a8cc90616e18cb22cec97f85c722bb8;hp=76ddbac87349ab883a0e527664526d68aba576c6;hpb=c0106888bd11a83e0f988ca9f90cc494a356b461;p=jalview.git

diff --git a/src/jalview/commands/EditCommand.java b/src/jalview/commands/EditCommand.java
index 76ddbac..a8aa886 100644
--- a/src/jalview/commands/EditCommand.java
+++ b/src/jalview/commands/EditCommand.java
@@ -344,8 +344,10 @@ public class EditCommand implements CommandI
         // read it to the alignment
         if (command.alIndex[i] < command.al.getHeight())
         {
-          command.al.getSequences().insertElementAt(command.seqs[i],
-                  command.alIndex[i]);
+          List<SequenceI> sequences;
+          synchronized (sequences=command.al.getSequences()) {
+            sequences.add(command.alIndex[i], command.seqs[i]);
+          }
         }
         else
         {