ACT! 2012 Pro, 2 laptops syncing into one central database. Database is upgraded from a single-user 2008. One of the two laptops gets the above error every day. The only KB article that comes close it is 28141, the difference is that 28141 refers to the error as a result of backup or maintenance, while my issue is during syncing.
I've applied the batch file attached to 28141 3x now and it still fails the next day.