Unreal Engine 5.5 <> DLSS 3.7.20 compilation error

DLSS 3.7.10

5.4

5.3

5.2

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see here Unreal Engine 5.5 <> DLSS 3.7.20 compilation error - #85 by vvondeux

as archive for history here’s wayback machine: DLSS - Download and Get Started | NVIDIA Developer

they restored the link in the download page NVIDIA DLSS | NVIDIA Developer

Still no version 5.5, 5.6 is coming soon with the GDC presentation next month, almost a year behind the most up-to-date version of Unreal at this rate :/

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DLSS for 5.5 is out now on the download page

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Oh my god

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Hello guys,

Have someone managed to make frame generation work with UE 5.5 since the release of the plugin?
I have a 4090 and can’t get any close to it working…

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In my case, DLSS Frame Generation and NVIDIA Reflex Low Latency don’t work. On top of that, they cause errors in the blueprint every time I open the project. When I package it into a fresh, clean project, it just gives a Fatal Error when launching the packaged “game”—whether it’s an old project or a brand new one.

It seems like some DLLs are missing, like nvngx.dll and _nvngx.dll. Also, the blueprint called “Is NVIDIA Reflex Supported” gets renamed to “IsReflexSupported” at the time of the error, and then it says “Cannot open unknown blueprint.”

Just to be clear, the issue shows up when opening the Editor, and after hitting Refresh on the broken blueprints, they seem to “go back to normal.” However, when packaging, even though it doesn’t throw ANY errors, launching the game triggers the Fatal Error pointing to both Frame Generation and Reflex not being found.

Long story short… DLSS 4.0 is here, but for now, I guess we’re stuck using good old Super Resolution only.

At least that’s how it’s going for me…
Still waiting for a fix.

plugin loading phase fix
Have you tried changing the loading phase of the plugin?
That should fix the blueprint error.

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OMG! You’re a life saver! It makes sense… I’ll try that.

EDIT: It works! THANK YOU!!!