Folks,

Marcos is correct that modifying runs outside of the UI is a task
that requires a lot of courage and should not be done cavalierly.

I also wanted to add that when we [finally] ,release v.5 of the code
(HE5, a free upgrade to all H42 users), the code will need to
recompile only very RARELY, in cases where the user has written their
own subroutine(s). All input parameters will be stored solely in
the IROOT.TXT file and the vast majority of runs can be made using a
standard, pre-compiled (or compile once, if dimens.inc is changed or
you port to a different OS) code. We did this to (1) make the
Iroot.txt files 'stand-alone' so runs can be repeated later, and (2)
to make it easier for users to call HE5 recursively from other apps
(though since it is not a DLL will still require some work on said
user's side). Of course, this required some changes to the IROOT.TXT
format.

Other improvements include better ozone cllimatology (based on the
TOMS v8), the ability to run either Hydrolight or Ecolight (screaming
fast, azimuthally-averaged version), extending data files farther
into the near IR and UV, and surface files that account for the
change in index of refraction with wavelength.

Anyway, just a glimpse into the (hopefully very near) future!

Regards,
Lydia