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?

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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.

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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