Overview
The following error generates when trying to save the plan:
An unexpected error occurred. Please report this problem to your system administrator with the following information:
System.Data.SqlClient.SqlException: The COMMIT TRANSACTION request has no corresponding BEGIN TRANSACTION.
What causes this, and what to do next?
This error occurs when running the data import, and another user saves the plan at the same time. Wait for the data import to complete or save the plan before running the data import.