problem with steps of incident electrons. see attached plot (macro runs.mac)
Created attachment 269 [details] done with macro runs.mac
Hi Michel, this is not a bug: in Otp4 EM physics constructor RangeFactor=0.01, while in Otp3 one - 0.04. If one change from 0.01 t0 0.04 the result become identical. Cheers, Vladimir