MSB3073 error after switching project from 4.27 to 5.2

[procakosa]

Hi
so yesterfay after instaling newest version of unral engine i switched my project version to 5.2 , after this i created a none c++ class i didnt change the default code of it but everytime i try to build it from source i get Build.bat end with code 6

[SeldinG]

This is a pretty general error and can occur for multiple reasons. However, regenerating c++ files from the Uproject tends to fix it.

I have also seen it when multiple instances of the project are open and you try to build. In that case, close anything that is “using” the source code of your game such as servers in the background or clients or other instances of the game.