Welcome to the TOPAS forum

Search the forum before asking questions. Try and keep questions brief. Off-topic posts will be deleted without consultation. Only registered users can post.. You can set your preferences to be emailed every time there is a new post. If you don't get a registration completion email (check your spam), email john.evans@durham.ac.uk with your username to complete registration. If a post is refused once you're logged in it is probably being blocked by the firewall, try removing unusual characters. Enjoy.