Hello Naomi, thanks for the reply.

>I'm not sure this is a good implementation to let form proceed to Activate.

I agree, but it works for now.

>First of all, would no return value will be enough for you to know that form's execution was stopped in the Init?

Unfortunately not - I need to know what the return value is (it will be an error message indicating why validation failed).

I'll give your parameter-object solution a try.

Regards,
Alan