Many of the events in AGCEEP still use deprecated commands.
Correcting secedeprovince to cedeprovince is very easy.
Open notepad++ and press CTRL + F, go to 'Find in Files' and browse for AGCEEP\Events directory, as shown below...
...and select 'Replace in Files'.
The 'addcore/removecore' commands and 'core' triggers are a bit trickier as now there are three possibilites. All the events involving cores need to be reviewed and selections made on whether cores are to be given as national, claim or casusbelli. Since 'core_national' functions exactly like the deprecated 'core' command/trigger, it can be used to mass-replace 'core', then be reviewed afterwards.
Correcting secedeprovince to cedeprovince is very easy.
Open notepad++ and press CTRL + F, go to 'Find in Files' and browse for AGCEEP\Events directory, as shown below...

...and select 'Replace in Files'.
The 'addcore/removecore' commands and 'core' triggers are a bit trickier as now there are three possibilites. All the events involving cores need to be reviewed and selections made on whether cores are to be given as national, claim or casusbelli. Since 'core_national' functions exactly like the deprecated 'core' command/trigger, it can be used to mass-replace 'core', then be reviewed afterwards.