In Bentley Raceway and Cable Management you can create a manual backup from application itself to safeguard your work against some unforeseen errors and issues.
This document will guide you on how to manually create a backup file of your DGN model in a predefined location of your choice or at the same folder where the original file is present.
If above problem still persists, then please create a Service Request and contact the Bentley Product Advantage group. Please include a list of all relevant details to get in depth analysis for a solution or workaround.
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