error when converting data

Hi, we are converting data from v258 to v422 in a production server expecting to take 6 to 8 hours to synchronise and 2.5 hours into update the MxRuntime stopped with the following error: Executing DLL commands failed. Error SQL (state: 08S01, Error code: 0) on executing: ALTER TABLE [module$table1_table2] ALTER COLUMN [module$table2id] bigint NOT NULL I haven't had the chance to have a closer look at the data as it's in a very secure client site, but assume that some entry on a link table is missing. Any ideas? LR.
1 answers

With the help of a Google search: it looks like a timeout.

Maybe you can copy-paste the SQL statements Mendix wants to do to on the synchronize database to a file and execute them on the database server or in parts.