UBB.threads PHP Forum Software Community Forums UBB.threads 6 Version 6 Support Upgrade: 6.1 - 6.5 complete: SQL Error: Unknown column 'U_OC_Userid' in 'field list'

Actually I was wrong it was added in the 6.3-6.4 altertable. Check the altertable-6.3-6.4.php script, around line 237.

Were the other fields in that query added? U_Birthday, U_ShowBirthday etc.... ?

If not, you'll need to re-run that query.