The operating systems of some computers define CP time limits
for job execution,
and abort the job with a system error when this occurs.
In most of the cases, users recover from the time limit error transfering
control to a summary subroutine that will eventually edit the histograms,
calling, e.g. HISTDO.
This can be inconvenient if the time limit condition
has been reached in HISTDO or other printing routines,
because the printing will restart from the beginning.
To avoid this, HBOOK can be instructed to
start printing just where it stopped before.
Action: In case of system error recovery during histogram editing, a possible recovery editing will start where the original printing stopped.
Remark:
If HPONCE has been called before printing, then a histogram that has been output completely will no longer be printed.