Over the last couple of weeks we have been on a bit of an upgrade splurge with clients; a number of them are doing test upgrades to Microsoft Dynamics GP 2018 from a variety of versions. One client is upgrading from Microsoft Dynamics GP 2016 RTM to 2018 RTM; according to the Upgrading Microsoft Dynamics GP hot topic, Microsoft Dynamics GP 2016 can be upgraded from version 16.00.0439 or later; however, when Analytical Accounting is installed, this is not correct.
To upgrade the client, we upgraded them to the last hotfix for Microsoft Dynamics GP 2016 (KB4056559 which is version 16.00.0641) and then to 2018; however, GP Utilities for 2018 errored saying that it could not upgrade Analytical Accounting from that version. Fortunately, we did not have to go back to a backup and redo the upgrade, as, while AA in installed, this particular client does not use the module.
I used the scripts to remove the tables and other database objects and was then able to run the 2018 GP Utilities to do the database upgrade without further issue.
I have previously upgraded a test system from 2016 to 2018 without issue; this was from KB3194397 (version 16.00.0558). We do have a small number of other clients with AA installed, so we now know what version of GP 2016 to upgrade them from to avoid this issue.