The output requested by variable MaxwellOutput is written
to the directory MaxwellOutputIterDir
when the iteration number is a multiple of the MaxwellOutputInterval variable.
Subdirectories are named Y.X, where Y is td, scf, or unocc, and
X is the iteration number. To use the working directory, specify "."
(Output of restart files is instead controlled by MaxwellRestartWriteInterval.)
Must be >= 0. If it is 0, then no output is written.
This variable can also be defined inside the MaxwellOutput block.
See MaxwellOutput.