JAL-2727 null additional references on close

[jalview.git] / src / jalview / gui / AlignmentPanel.java

diff --git a/src/jalview/gui/AlignmentPanel.java b/src/jalview/gui/AlignmentPanel.java
index 9b74007..c8a0e1a 100644 (file)
--- a/src/jalview/gui/AlignmentPanel.java
+++ b/src/jalview/gui/AlignmentPanel.java
@@ -1621,8 +1621,8 @@ public class AlignmentPanel extends GAlignmentPanel implements
     if (av != null)
     {
       av.removePropertyChangeListener(propertyChangeListener);
-      jalview.structure.StructureSelectionManager ssm = av
-              .getStructureSelectionManager();
+      propertyChangeListener = null;
+      StructureSelectionManager ssm = av.getStructureSelectionManager();
       ssm.removeStructureViewerListener(getSeqPanel(), null);
       ssm.removeSelectionListener(getSeqPanel());
       ssm.removeCommandListener(av);