Hi,

> I found that answer for exceptions which can occur during the processing:
>

>https://lists.boost.org/boost-users/2012/03/73904.php
>
>Here is handled the case that exception is derived from std::exception.

>What happens if not?

>Can the parameter be changed to std::exception_ptr or just a

> template Parameter?

only std::exception are caught. Others just go through and interrupt the transition, which might leave the state machine in a dirty state, where an entry or exit action would not have been called.

Cheers,

Christophe