FMemoryWriter error

Hi guys,

I’m working on Arch viz project.

I have to do a packaging test, and the process fails.
I use the menu File - Package Project → Windows 64

at the beginning, the Error Log report to me a material error. Now, I deleted this materials, and the error is now :

LogWindows: Error: FMemoryWriter does not support data larger than 2GB. Archive name: None.
LogWindows: Error:

I tried to reduce all the lightmaps ( select all actor mesh → override lightmap → 64 ), I tried to delette the biggest objetcs, check Compress Lightmap, check Chunk level… but nothing

Pack failed, same error.

What is the problem ? :confused:

Thanks all