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Failed to allocate connection.

During the completion phase of creating an ADO connection, an error occurred and the connection failed. You can try any of the following remedial actions:

  • Try the operation again.
  • Restart Visual Studio and try again.
  • Restart your computer and try again.
  • Check the Microsoft Knowledge Base for any available new information on ADO connectors and the Visual Database Tools. See the Microsoft Support Knowledge Base.