# pflotran / Depreciated / Documentation / QuickGuide / Restart

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## RESTART Card

Specifies restart options.

### Required Cards:

RESTART <string> <optional float>
specifies name of restart file and optionally the time at which to restart if different from checkpoint time.

If the optional float is present, the simulation will restart at the time (currently in seconds) indicated by the floating point number. Therefore, if one would like to restart setting the time back to zero, but keep the checkpointed solution, use "0." as the optional float.

### Examples

Restart the program running from where it left off when the file pflotran.chk3000 was printed

RESTART pflotran.chk3000


Restart the simulation from the end of the previous simulation, but set the time back to 0.

RESTART restart.chk 0.


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