Op 08-04-19 om 12:55 schreef 장지웅(수학과):
I posted the result of new try in the same link: https://tex.stackexchange.com/questions/483668/installing-lyx-no-textclass-is-found?noredirect=1#comment1222832_483668 Thanks, Jiwoong Jang
Sometimes these problems occur when one of miktex and lyx has been installed as administrator and the other as ordinary user (i.e. a user without administrative rights). In my experience it is best to install both as administrator; but whenever you need to reconfigure lyx, you must then start it as administrator.
Best, Kees
