Mongoose Error

[HaNgMaN]

If anyone is still having problems with the mongoose error, i solved mine by going into SteamVr settings go to the startup/shutdown tab and "choose Startup overlay apps" and deselecting the app so its says 0 selected. The game booted up fine after that.

[duke (Danny)]

Yea, I just experienced that issue, had like 2 cases of the game just turning itself off without any message. The first time after I restarted the game and it didn't load, I saw something with mongoose and SteamVR needing a restart. After doing so, the game started up again and then it closed itself without any message after a couple of minutes of playing while at Russells place.
Gonna try the solution you are saying worked for you and see if that fixes it, thanks!

[Buckle_Barry]

Disable your Antivirus, as soon as I turned it off it booted it right up.

[레서]

I was using SteamVR beta 1.17.2. And I reinstall it 1.16.10 not beta version. And error is gone.

[Audax]

Originally posted by Buckle_Barry:

Disable your Antivirus, as soon as I turned it off it booted it right up.

This put me on the right track. I added the Half-Life: Alyx exe-file to the list of exceptions of my firewall and the problem was (finally) fixed.

[bean007]

Right-click on half-life alyx in your library to bring up your menu. Properties>General>In Launch options type "-novid". That fixed my mongoose error, but it would crash. So, I ran it in beta and now it works. Click Steam in the upper left corner, select settings>Account: beta participation>change drop-down menu: steam beta. I hope this helps you as it did for me.

[Dubious]

This is still an issue. Many fixes have been suggested, but none solve the underlying bug. Fix it, Valve!

[TheOnlyDoor]

Yup,
Tried every single suggestion here. Still getting mongoose error on start up.

[Tellic]

What solved it for me was adding ' -novid' to Properties->General->Launch Options for Half Life Alyx.

Nothing else worked:
- killing webvrhelper jobs? No
- verifying files of VR and Half Life Alyx? No
- restarting? No
- disabling antivirus? No

But just adding "-novid" did the job.

It's weird how this just crops up out of the blue. One day it works. Next day it will not play.

[wlodar007]

What solved it for me was adding ' -novid' to Properties->General->Launch Options for Half Life Alyx. - me too agree!