[2021] CK3 Crash on Launch

Run a Steam Verify operation against. the game, see if that finds anything to fix.

If not DXDIAG is a program you run from a command prompt or the Windows start menu 'run' dialog box (or 'search programs' in Windows 7 or later). After running it will open a window and start collecting info with a progress bar in the lower-left corner. When it completes click the 'save all information' button and save it to a file then attach that file here.

Please attach your Documents/Paradox/CK3/settings.txt and pdx_settings.txt .
From your Documents/Paradox/CK3/logs/ folder, attach system.log .  

Just get this file made and posted here please, I think I explain it fairly clearly:

DXDIAG is a program you run from a command prompt or the Windows start menu 'run' dialog box (or 'search programs' in Windows 7 or later). After running it will open a window and start collecting info with a progress bar in the lower-left corner. When it completes click the 'save all information' button and save it to a file then attach that file here.  

Jancarski said: where do i save file

Anywhere will do, as long as you can then find it and attach it here then, so i can read it.  

Vasoli said: My crash is not on start, but after short playing the game.

Then it is not the same problem, as that was a crash at start. In future please make your own new thread, thanks.

We see a number of mod errors in that log, so if this crash happens when using any mods they are very likely the problem.

Otherwise is the crash repeatable from a particular save game file? or does it happen in any new campaign you start as well?