Hi Pete!

Thanks a lot, it seems to me it's working fine.

I tried before to run a grid on Z saying to Cloudy it was age! It worked fine,
but the user have to be very careful with the way Cloudy is managing the inputs:
most of the time it's taken a number as a log. It seems that the Z you
introduced is linear, that's fine. Should be clearly documented.

Best regards, and sincerely thank you.

Christophe