Am 30.03.2019 um 16:10 schrieb HASAN:
I have installed Lyx 2.3.3-2 and there was a problem. There was message box which told me that amsart.cls is not exists, so the program is not producing pdf.
Dear Hasan, amsart should always be available. Try to - log in as admin and assure you have Internet connection - reinstall LyX using this installer: https://github.com/donovaly/LyXWinInstaller/releases/download/232.1/LyX-232-Installer-1.exe - after the installation use the menu Help->Math and view this document as PDF. Does this work? If yes your problem should be solved. regards Uwe p.s. the best mailing list to ask for help is lyx-users not lyx-docs
