Q. I think I found a bug in CASTEP. What should I do?

A. First check whether anybody else has seen the behaviour, a search or post on the mailing list is a good starting point. Access to our bug tracker is available to licensed groups upon request.

When reporting bugs, please try to include a minimal set of input files to demonstrate the problem if at all possible, a description of the steps needed to reproduce the problem, and a statement of both what result you expected and what you observed.