Unreal 5.0.3 broke datasmith

Hi, After i’ve updated to 5.0.3 version - datasmith no longer works.
When i use it freezes on 61% and unreal is unresponsive (have to kill it in task manager)

This totally cripples me in my project and i can’t get work done.

A collegue has 5.0.2 and it still works there.

I want to downgrade to Unreal Engine 5.0.2 - but i can’t find an option to do that.

Anyone know a fix to datasmith or a way to downgrade unreal from 5.0.3 to 5.0.2?

Can you give us more details on what you are trying to import?
CAD file? .udatasmith file? Created with which DCC?

Sorry my apologies,

I’m trying to import a Cinema 4D project, from C4D R25.120 - using the Save Project for Cineware function. This works in 4.27 and in 5.0.2 when i had that version of UE.

Currently i have to datasmith the c4d prj. into UE4.27 then open that project in UE5, then migrate assets to my main project folder.

Not a specialist but did you check answer from @AKnauerMaxon in that thread already?

Yes that line of code is there, and it’s still not working.

Hello Abird69,
There will be an updated, fixed plugin uploaded soon to Maxon - Unreal Integration

In the meantime you can try this out: Rename the Cinema installation to something else. For Example add an underscore “C:\Program Files\Maxon Cinema 4D R25_”. Then open Unreal again and try the import.

Changing the name of the Cinema4D install folder works to fix the datasmith bug!

Thank you!

If you have time, could you perhaps go to Support Center
and create a ticket for Cinema4D and “Unreal Datasmith” in the description, with the C4D file that caused the freeze? The file will be handled with confidentiality. Thank you!

哈哈哈,你的问题与我相似。奇怪的是5.03更新后无法降到5.01或5.02。我研究了几天时间,尝试了多种方法,都没有用。
最后我在同事的电脑上复制了5.01的UE软件,但是epic上面无法加载他,上面只有5.03。就非常傻逼。
我还遇到了其它崩溃的问题,就是sequence中摄像机融合和渲染的问题。测试了下5.02其实也有问题,5.01中完全正常。5.03中就完全没法用这个功能了。
这是虚幻官方的BUG。
现在我只能手动在本地找到5.01的虚幻打开

This worked. Thank you