Hi All, It's been a while that i haven't blogged anything. Today i would like to discuss an issue raised to me by most of the Readers that they face during Data Migration in Upgrade Activity. The Error message occurs before step two after opening database in NAV 2013 R2. When we open our database in NAV 2013 R2 and import customized objects and then try to Run the NAV 2013 R2 Client, it behaves in an unexpected manner . Instead of opening the client it says - The operation could not complete because a record in the <<>> table was locked by another user. Please retry the activity. OR A connection to the server has been established. preparing your work space. OR Fields cannot be found in Marketing setup..