X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fappletgui%2FAlignFrame.java;h=8f2865864217a642e497f3f17d2b901f7ee46dfd;hb=29c0f412ffb98c0b6d3d27714f2b6b032253f3bc;hp=e77ae544fa315f1f6a91eedd47228113d5852ad2;hpb=607a4aecda2f99866bb1acf7d364a6dde4e215bd;p=jalview.git

diff --git a/src/jalview/appletgui/AlignFrame.java b/src/jalview/appletgui/AlignFrame.java
index e77ae54..8f28658 100644
--- a/src/jalview/appletgui/AlignFrame.java
+++ b/src/jalview/appletgui/AlignFrame.java
@@ -1924,8 +1924,8 @@ public class AlignFrame extends EmbmenuFrame implements ActionListener,
 
     if (viewport.hasHiddenColumns() && viewport.getSelectionGroup() != null)
     {
-      copiedHiddenColumns = viewport.getAlignment().getHiddenColumns()
-              .getHiddenColumnsCopy();
+      copiedHiddenColumns = new Vector<>(viewport.getAlignment()
+              .getHiddenColumns().getHiddenColumnsCopy());
       int hiddenOffset = viewport.getSelectionGroup().getStartRes();
       for (int[] region : copiedHiddenColumns)
       {