This solved my problem with NaN in VAB apparently, thank you very much and keep up very good work!
First, thank you for this great mod. Only this mod with planets mods keep me hooked to KSP. But I have got one strange problem with the newest version. Almost all parts with electric generators give me in VAB NaN price and NaN weight, so I cannot launch any new ship. Because yesterday it worked fine and I have only changed KSPI-E with CKAN, I think this problem could be related to the newest version of KSPI-E.