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# WALLCLOCK_STOP¶

Specifies a wall clock stopping criteria. Useful if running simulations on a remote cluster or supercomputer.

## Required Cards:¶

WALLCLOCK_STOP <float> <optional string>
Specifies a wall clock time (and optional units, default = hours) at which the simulation will shut down gracefully generating a restart file, if specified. The option is especially useful when there is an upper limit of wall clock time you can request on supercomputers and you are not sure if the run will be completed within the time.

## Examples¶

Stop simulation after 12 hours

WALLCLOCK_STOP 12


Stop simulatoin after 60 minutes

WALLCLOCK_STOP 60 min