How does Exception Handing work in Bonita?

Sorry if this sounds like a stupid question. 

Whenever I create processes, I think I only use constraints to tell me if there's an error in the form. So I was wondering if there was any other ways of doing exception handling in Bonitasoft.

Cheers!

Hi

Can you read log of Bonita?

It's in Help menu : Bonita Engine log

Ahh yes I know about this and use it often.