Application object has been deleted
What happened
Your DESKTOP6.NDK file, which contains the list of IBM® Notes® application icons in your Open list or Bookmark bar, has become corrupted. You might see this message when you attempt to open an application; you might also be unable to remove that icon.
Note: In earlier releases, this file was named DESKTOP5.DSK.
What you can do
You won't be able to remove the corrupted icon from your desktop until you replace your DESKTOP6.NDK file. If you have a backup copy of your DESKTOP6.NDK file, use your operating system to replace the file; otherwise, try compacting the file.