How to stop package execution from SSIS or logic

Hi all,

I need to stop the execution of a package (datamanager) when the user chooses a particular (wrong) category from the package prompt. It is a security check.

The package uses a custom dtsx chain.

I need to stop it using a SSIS task (I don't know how) or if it is simplier I need to stop just a script logic (.lgf) that is inside the package.

Thank you

(bpc ms version 10)