X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;ds=sidebyside;f=src%2Fjalview%2Fgui%2FTreePanel.java;fp=src%2Fjalview%2Fgui%2FTreePanel.java;h=2d8e729c2c54833082ed5f8366e8b408d15f46ec;hb=f8691b979a068d0992608a51de66271f299dbb6b;hp=37b4dac5b5b17f5101e4dcdb21b2e239542aa73f;hpb=7c269dc87e6fda52db3d73d07bc5f3e879e1f681;p=jalview.git

diff --git a/src/jalview/gui/TreePanel.java b/src/jalview/gui/TreePanel.java
index 37b4dac..2d8e729 100755
--- a/src/jalview/gui/TreePanel.java
+++ b/src/jalview/gui/TreePanel.java
@@ -159,6 +159,7 @@ public class TreePanel extends GTreePanel
         {
           av.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()