The Expanded JCL value used during Fast Step Restart function
is the value found in the related CP operation record (built from
the AD application definition value unless later modified by the user
via MCP).
Restart Range
When you request a Fast Step Restart, you take defaults
for the first and last step to be included in the rerun. The first
restart step is defaulted to the best step identified by the scheduler,
if any. If there are no restartable steps and therefore there is no
best step, the process is stopped and an appropriate message is issued.