Setting restart steps
Restart files are used to safeguard against system failure by providing a snapshot of the simulation at the time of writing. You can configure the number of restart steps that are saved when you run a Midplane or Dual Domain Fill+Pack analysis.
Using restart files to extend an analysis
You can use restart files to run subsequent analyses in a sequence, without re-running previous analyses in the sequence, providing there are no changes that invalidate the earlier analyses.