X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fgui%2FTreePanel.java;h=6c9c892124093b1db44a851873454f12d083b4c5;hb=c6018dc0dc12720e13b75850a5303279ac7094b7;hp=ca4f84e53a4e4da494d3334a3b4d349b590cf7cc;hpb=ac5f0c912a1c7819530456bab13942ad3734460b;p=jalview.git

diff --git a/src/jalview/gui/TreePanel.java b/src/jalview/gui/TreePanel.java
index ca4f84e..6c9c892 100755
--- a/src/jalview/gui/TreePanel.java
+++ b/src/jalview/gui/TreePanel.java
@@ -159,6 +159,7 @@ public class TreePanel extends GTreePanel
         {
           getViewport().removePropertyChangeListener(listener);
         }
+        releaseReferences();
       }
     });
 
@@ -168,6 +169,17 @@ public class TreePanel extends GTreePanel
   }
 
   /**
+   * Ensure any potentially large object references are nulled
+   */
+  public void releaseReferences()
+  {
+    this.tree = null;
+    this.treeCanvas.tree = null;
+    this.treeCanvas.nodeHash = null;
+    this.treeCanvas.nameHash = null;
+  }
+
+  /**
    * @return
    */
   protected PropertyChangeListener addAlignmentListener()