On migration from version 7.1 or 8.0 to 8.1 the following error message might occur:
Processing step 'ATT 2018.0004.0026.0000 (Start 8.1)' failed.
Invalid object name 'Org'.
This is a product defect (31599)
This will be fixed on a future release of the product. If you require this immediately corrected, please contact support for a hotfix referencing the defect ID 31599.