UE 5.3 Multi-Process Cook / Project Building broken?

Development Platform & Builds
1

Hello,

we are running into an issue with seamingly the new Multi-Process Cook in UE 5.3.
We try to build a new release of our game via Project Launcher for multiple platforms.

However it now takes ~3h to complete while before it was ~25min. The issue seams to be in the Archiving process of the build progress. While archiving the Project Launcher tries to access the newly created files which failes as another process is using them and it will retry in 10s again. This repeats until it was able to access the file and starts the same again with the next file.

The Archiving process is something we can’t let go as on Consoles this is neccesary to build a launchablle and submittable version.

Did anyone run into this issue before and maybe knows a workaround?

Thanks!

2

unreal engine 5.3 is completly broken. do not udse it. 5.2.1 works way better.

1 Like
3

mine is not working too, after i change the source code to make the CookWorker starts successfully, there’s 2 problem:

  1. CookWorker failed to load .uasset and identify it as already cooked stuff and try to delete it.
  2. SaveQueue is always blocked, after almost cooked, everything just cannot be saved.
    hope someone get into that
4

We found a solution. We had packaging and archive always to the same folder. Set both to different folders and it works.