Fusion 360 stops at initial splash screen

[arbelac.phoenixrider]

Fusion 360 will not load on my system suddenly. I've tried the following:

- Uninstall and reinstall

- Uninstall, Fusion 360 clean, and then reinstall with 'Run as Administrator'

- Uninstall, Fusion 360 clean, delete folder, install Autodesk Desktop App, install Fusion 360 as admin

- Uninstall, Fusion 360 clean, reinstall as Administrator with '-o single' option

- Running Fusion 360 in Safe Mode with Networking

They all just hang on the initial splash screen when trying to launch the application.

OS is Windows 10 Enterprise, ver1909 (Version 10.0.18363.959). Graphics card is an Nvidia 2070RTX w/ driver rev 446.14.

This setup was working when I last used it a couple weeks ago.

I've attached logs from the last install (with the '-o single' option)

[RajkumarIlanchelian]

Thank you for sharing the log files. We will take a look as priority and reach out. 

[RajkumarIlanchelian]

@arbelac.phoenixrider one clarification - When you mentioned you did "Uninstall, Fusion 360 clean" did you mean you used the clean uninstaller tool to do the uninstall? Is that what you meant by Fusion 360 clean?

https://knowledge.autodesk.com/support/fusion-360/learn-explore/caas/sfdcarticles/sfdcarticles/How-t...

[arbelac.phoenixrider]

Uninstalled via Add/Remove Programs, then ran Fusion 360 cleaner to clean up any leftover files.

[arbelac.phoenixrider]

Any update on a solution? This is still happening.

[RajkumarIlanchelian]

@arbelac.phoenixrider Unfortunately still looking into what are the possibilities. At this time we suspect a couple of things:

1. Graphics card drivers - Could you please check to see if your graphics card driver is up-to-date?

2. Add-ins causing an issue? Do you use 3rd party add-ins with Fusion 360 from the Fusion App Store? 

IF one of the above does not lead us anywhere, we would need to install a process monitor and capture what is happening during Fusion launch to dig deeper on why this is not working. 

One another thing I would like to try is to see if you are using a shortcut that you created a while ago and if directly going to the exe and launching it does anything. 

[arbelac.phoenixrider]

I have no add-ins from the Fusion store.

Launching Fusion360.exe directly from the ../webdeploy/production/81fe16c330656df1a293195f4c169d3f2a29c315/ folder exhibits the same behaviour. The shortcut is also fresh, since it was removed and replaced with the reinstalls.

I will have to see if an updated driver will run on my system. Last time a newer driver was tried, some other software I used experienced significant performance degradation. I'll get back to you on this one.

[RajkumarIlanchelian]

Would you also be able to run a process monitor for Fusion 360 and send the capture? This would help get more details on why it is hanging.

[arbelac.phoenixrider]

Do you have a preferred monitor solution? Are you looking for ProcMon tracking?

[RajkumarIlanchelian]

Yes, ProcMon tracking is what I am asking for.

[arbelac.phoenixrider]

ProcMon has shown me what the issue is. Fusion360 is trying to connect to a server over IPv6, and that server isn't functioning correctly.

When I disable IPv6, Fusion360 will start.

The IPv6 address in question is 2600:9000:20e3:f600:3:40d0:6540:93a1; the procmon log shows a Disconnect/Reconnect cycle for this address that just repeats.

The application should call this out as a service down, and throw an error message specifically saying it can't connect to 'x' address.

Note that disabling IPv6 is not a solution for me. I have other applications that utilize it.

[arbelac.phoenixrider]

There was an issue on the network with outbound IPv6 (internal IPv6 was unaffected). I've got this working now that it is running.

The application, if it's going to be IPv6-aware (and frankly, for IPv4 connections as well), should handle network connectivity issues better, and at least fail gracefully. From the procmon results, going into a connect/disconnect/retry loop with no timeout or iteration count is a software error.