# 3.3. Replay a Problem¶

Once a simulation is completed, one might want to compute other fields of the solution. This can be done with cbcposts Replay-functionality. The process can be done in very few lines of code.

In the following, we initialize a replay of the heat equation solved in A Basic Use Case and restarted in Restart a Problem. First, we set up a postprocessor with the fields we wish to compute:

from cbcpost import *
from dolfin import set_log_level, WARNING, interactive
set_log_level(WARNING)

pp = PostProcessor(dict(casedir="../Basic/Results"))


replayer = Replay(pp)