KPAPAD

I have tried the latest release G and it works ok.

I tried what you suggested but it does not work for me. It is not that the choices are not available, but rather whatever you select is not applied. Anyway, thanks. I am awaiting the bug-fix in the next release.

In Edit\Project Settings\Climate Calculations\Site corrections look-up tables it seems that you cannot apply any selection other than the default option:Interpolation. Have you actually deactivated the other two options (Nearest node and Do no use)?