Hi, Today I irresponsibly upgraded to Data Objects 4.4 (hoping to get the benefits of the latest release!) and I am cursing myself. There were a number of errors, even after using the Upgrade Tool. I manually corrected those. Finally, I am getting this error, when I use Perform option on an existing database. No upgrade handler is found for assembly 'Xtensive.Storage', version '1.0.0.0'. When I looked in the database, Metadata.Assembly was still pointing to Xtensive.Storage. After I changed in to Xtensive.Orm 4.4.0.0 manually in the existing database Perform option started working normally. The upgrade process with existing applications having real data is not handled properly. I have wasted over 8 hours in what seemed to be very simple looking stuff. I hope DO4 team takes notice of the pains which people have to go through when upgrading apps in production. Thanks. Ahmed Fasih Akhtar |