RTV Tools

Tuesday, May 22, 2012

Cannot Restore Backup Version an Unknown Error Occurred

There is a nasty little bug that sometimes causes Backups (and any attempted Restore) to fail on a workshared project.  The way to avoid this problem is so simple that it should probably be implemented on all workshared projects in your office:

check Regenerate if view/sheet is not up-to-date.  This will create a thumbnail for the non-opened view to be included with the initial backup version and eliminate the error message when saving the backup version.
via
Cannot Restore Backup Version an Unknown Error Occurred - The Revit Clinic



However - if you have already come across this problem and it is too late to check the above box ... you may be able to get the Restore to work IF you reinstate an appropriately named preview.xxxx.dat file into the _backup folder.  Its worth a try if you are struggling to recover some important data.

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