X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fgui%2FTreePanel.java;h=6c9c892124093b1db44a851873454f12d083b4c5;hb=e1aa3fdd1ca82abf5acc0cd3c2b86a5ca1083941;hp=084f46170f73b4c25dfddc237dd420c05873563b;hpb=7e82e1fed011077e5cd4cc40ac8ad3519d7c47a8;p=jalview.git

diff --git a/src/jalview/gui/TreePanel.java b/src/jalview/gui/TreePanel.java
index 084f461..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()
@@ -879,7 +891,7 @@ public class TreePanel extends GTreePanel
     /*
      * put them together as <method> Using <model>
      */
-    final String ttl = MessageManager.formatMessage("label.treecalc_title",
+    final String ttl = MessageManager.formatMessage("label.calc_title",
             treecalcnm, smn);
     return ttl;
   }