After upgrading to the 4.11.1 Hotifx today, I can no longer use the VR Preview functionality. It was working fine in 4.11.0, and it still works properly in 4.10.4 (so it’s not my hardware). Here is my full log output: output.log · GitHub
The relevant lines seem to be:
LogHMD: SteamVR initialized. Driver: lighthouse Display: LHR-6EAE22AF
LogHMD: SteamVR failed to initialize. Err: 301
Just launch Unreal Engine 4.11.1 with administration right.
After all work for me flawless.
I went into the directory with the UEEditor executable is located, and set it to run as an Administrator. While that did un-grey the VR Preview button, I’m still getting the same error (301) when starting up, and even when I run it as a VR Preview it doesn’t work on my Vive Pre.
Have you ensured that all your firmware is up-to-date for your Vive?
I just tested this using our Vive and I was able to use VR Preview successfully. If your firmware is not updated, go ahead and do that and let me know if it makes a difference.
Can confirm launching Unreal Engine 4.11.1 as an administrator fixed this issue for me. The log file then changed to:
LogHMD: SteamVR initialized. Driver: lighthouse Display: LHR-D13F8C5F
LogHMD: SteamVR initialized. Driver: lighthouse Display: LHR-D13F8C5F