About band output function

Hi all,

I have a simulation for point-defect PC microcavities where I iterate some
parameters for my structure and I would like to have a field output after each
iteration. However since the h5 file name (ex. e.k01.b01.x.te.h5) is same for
every iteration, it will overwrite each other. I am wondering if there is anyway
that I can rename it by writing some comments in each run.

Thanks a lot,
Mindy