Ax 2012 data upgrade in Tier-1 development environments(CHE). Error: System.IO.FileNotFoundException: Could not load file or assembly 'System.ValueTuple, Version=4.0.3.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies.

During the data upgrade from AX2012 to D365FO I got the following error in step 3 on /DataUpgrade/PreReqs/AdditiveDbSync:

System.IO.FileNotFoundException: Could not load file or assembly 'System.ValueTuple, Version=4.0.3.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. The system cannot find the file specified.

The workaround to solve the error was to copy the System.ValueTuple.dll file from "K:\AosService\PackagesLocalDirectory\bin\ModelUtilDlls" to "K:\AosService\PackagesLocalDirectory\bin"

There is a registered issue 1029905 on the LCS portal regarding this error.

Ax 2012 data upgrade in Tier-1 development environments(CHE). The status is in "In Progress" for a long time.

During the data upgrade from AX2012 to D365FO 10.0.42 version I faced an issue in step 3 (Post Sync\ExecuteScripts). The status was in "In Progress" for more than 12 hours. 

But when I checked the process, there were no pending post-sync scripts to run, and all post-sync script were completed.

I checked the status of the process with a query: select * from DBUPGRADE.SERVICINGSTEP

I decided to change the status of the «ExecuteScripts» step to complete it manually, since there were no pending post-sync scripts to run:

UPDATE DBUPGRADE.SERVICINGSTEP SET STATUS=2 WHERE PATH = '/DataUpgrade/PostSync/ExecuteScripts';

Then I closed the cmd window and re-ran step 3 but I got an error:

I closed the datupgradebatch.exe process using the task manager, re-ran step 3 and the data upgrade process was resumed and completed successfully.