Time in minutes before which the restart file will be written. This is to make sure that at least one restart
file can be written before the code might be killed to to exceeding the given CPU time.
If a finite time (in minutes) is specified, the code will write the restart file when the next
iteration (plus the RestartWriteTime) would exceed the given time.
A value less than 1 second (1/60 minutes) will disable the timer.