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Can't open Clipboard (Error 521)

office 365 dev account|Last Updated: 6/12/2017
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1 Contributor

The Clipboard has already been opened by another application. This error has the following cause and solution:

  • Another application is using the Clipboard and won't release it to your application. Set an error trap for this situation in your code and provide a message box with Retry and Cancel buttons to allow the user to try again after a short pause.
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