Since ages it was possible to enter a bc of 0 - excel would crash. Nobody complained, how is that possible? anyhow this is fixed now.
Because of a small project that will end up in another spreadsheet to download I added the unit mil (=mili radian, = 10 cm per 100 m) well known from scope recticles
mil = mrad = 1/1000 rad = 0,001 rad = 10 cm / 100 m.
thx!