How to handle CodeUnit 1 Logic in Business Central upgrade

As you all are aware that Codeunit 1 (Application Management) has been removed and it is replace with new system codeunits. By moving this there is no functionality changes but this process will affect upgrade process for NAV.

All these functions has been changed  to different event including publishers and subscribers that means instead of calling Codeunit 1 functions business central will use system codeunits.

Following tables will illustrate mapping between codeunit 1 triggers and event publishers.

Hope this helps you