I made some simulation for very simple RC and CR ciruits. When I run the transient simulation waveforms I obtain are correct. Even the curves shown in the project are nice curves. But when re-opened they are "strange" as if there was missing data. see project : https://easyeda.com/jmter/Filtres_RC_CR-1I4Oyi2M7 What happens ? I also tried to save csv data and in execl , curves are bad !! (excel files in the project also) Thank you to tell me if I made something Wrong ?