X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fgui%2FStructureViewerBase.java;h=1bb651a2b301516e7c8dcb81d47630af6120cc57;hb=ad94fe2f24935ae35a6531d52b706cea889196d2;hp=77ba38d2989c5af52d99832373d0bc45f44dd7ec;hpb=990c7b35fef576a3b2ae28dcf86cf775630bd455;p=jalview.git

diff --git a/src/jalview/gui/StructureViewerBase.java b/src/jalview/gui/StructureViewerBase.java
index 77ba38d..1bb651a 100644
--- a/src/jalview/gui/StructureViewerBase.java
+++ b/src/jalview/gui/StructureViewerBase.java
@@ -1053,7 +1053,10 @@ public abstract class StructureViewerBase extends GStructureViewer
       repaint();
       return;
     }
-    setChainMenuItems(binding.getChainNames());
+    synchronized (chainMenu)
+    {
+      setChainMenuItems(binding.getChainNames());
+    }
 
     this.setTitle(binding.getViewerTitle(getViewerName(), true));