WASM Crash

[EilidhP]

My fourth WASM crash in a row (I have only attempted four flights in this aircraft).

• Aircraft: A350-900
• Simulator: FS2020
• Navdata Method: Navigraph
• OFP: LFBO/14R FIST7A FISTO POI PEPAX UT182 KEPER KEPE9P LFPG/08R
• WASM Error Codes:
  • [Coherent GT] Failed to locate file vfs:///html_UI/Pages/VCockpit/Core/WasmGaugeLiveView_0
  • [Coherent GT] Failed to locate file vfs:///html_UI/Pages/VCockpit/Core/WasmGaugeLiveView_1
  • [Coherent GT] Failed to locate file vfs:///html_UI/Pages/VCockpit/Core/WasmGaugeLiveView_4
  • [Coherent GT] Failed to locate file vfs:///html_UI/Pages/VCockpit/Core/WasmGaugeLiveView_5
  • WASM: Exception c0000005 in gauge MFD in module vfs://inibuilds-aircraft-a350/SimObjects/Airplanes/inibuilds-aircraft-a350-900/panel/inibuilds-A350.wasm
• Specs: Intel i7-12700H; NVIDIA GeForce RTX 3070 Laptop GPU; 40GB RAM.
• Screenshot: Screenshot included
• Reproduction of error: All four times the WASM crash has occurred when manipulating the MCDU. This time, I was trying to insert a new route after swapping the nav database.

 

You've built a beautiful aircraft, and I'm really impressed with everything else I've seen of the aircraft, but the fact that I have a 100% WASM crash rate is incredibly disappointing.

[EilidhP]

I should have added, this was on the 1.0.2 version.

[richboy2307]

Hi @EilidhP

Thanks for your report. Passed on to the team.

On 3/8/2025 at 6:30 PM, EilidhP said:

but the fact that I have a 100% WASM crash rate is incredibly disappointing.

I understand your frustrations, the team are committed to resolve these instances of WASM crashes and improve stability for all.

WASM is complex and is limiting by the fact there is no exception handling, so in case of even a small error in code or data received, the entire WASM crashes rather than failing a specific part of the function. So to reduce WASM crashes as much as possible, you need code to self-handle all edge cases perfectly. 

We are working tirelessly to that end and reports like these help in this effort.

Thanks for your time and patience meanwhile!

[richboy2307]

I am sharing below information in the interest of transparency, to show that we're committed to the cause to improve the experience for all our customers as mentioned above but this issue is a complex one.

100% reproduction on one system does not mean 100% universal reproduction. As seen in this video below, I've been trying a few times to reproduce the crash based on your report. Loading in to an airport, changing navdata sources and constantly re-importing. Have done so over 50 times without a crash as yet on A350-900 (v1.0.2) in FS20.

Once we get successful reproduction, we can introduce debuggers/logging to investigate further code-side and weed out the root cause. We try this on multiple systems and across testers by sharing the reproduction steps with them.

So, if anything else to add to help us better reproduce the above, would be appreciated.

Thanks!