microsoft/openvmm

# OpenHCL Troubleshooting

This page includes a miscellaneous collection of troubleshooting tips for common
issues you may encounter when running OpenHCL.

If you are still running into issues, consider filing an issue on the OpenVMM
GitHub Issue tracker.

## \[Hyper-V] Vtl2/Vtl0 failed to start

VTL2/VTL0 fails to boot is when either VTL2 or VTL0 has crashed. When the crash happens, they will emit an event to the Hyper-V worker channel.

First, check `Hyper-V worker  events` at `Applications and Services Logs -> Microsoft -> Windows -> Hyper-V-Worker-Admin`

Alternatively, some queries you can use to get Hyper-V-Worker logs:
- Display the `{n}` most recent events -  `wevtutil qe Microsoft-Windows-Hyper-V-Worker-Admin /c:{n} /rd:true /f:text`
- Export events to file - `wevtutil epl Microsoft-Windows-Hyper-V-Worker-Admin C:\vtl2_0_crash.evtx`