This keyword contains a string which specifies the model file used to continue the job.
DEFAULT (case-insensitive) means that the file seedname.check will be used. The same effect can be achieved by providing the CONTINUATION keyword on its own, with no value.
A run cannot be both a REUSE and a CONTINUATION. A CONTINUATION run restarts the current job from the end of the previous one. As a consequence, only a limited subset of the available parameters may be changed between CONTINUATION runs.
NULL - corresponds to no continuation (a new run)
CONTINUATION : DEFAULT
CASTEP keyword glossary
CASTEP parameters keywords