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Problem with activating DX12

Hello,

I am trying to use the new ray tracing feature whith my new RTX 2080

I have followed the steps by installing the latest drivers and updating windows.
Now I have to write -dx12 in the shortcut menu. When I do this i get an error.

How can I fix this?

In the Target don’t use quotes and you need a space before -dx12

I got it to work but the screen freezes constantly now if i change anything…

I did this, but it still gave me the error message.

The path need to be between quotes and the command line need to be out, like this:

“E:\Gamedev\UE4\Epic Games\UE_4.22\Engine\Binaries\Win64\UE4Editor.exe” -dx12