SU4 beta 1.6.3 Environment Variables (E:) are broken

[MSFS 2024] Bug Reports WASM
1

Version: 1.6.3

Frequency: Consistently

Severity: Blocker

Context: Aircraft built with SU3 SDK

Bug description:

Access to E: vars using Vars API does not work for WASM gauge. fsVarsEnvironmentVarGet gives garbage data. This completely breaks our aircraft.

Repro steps:
Try to read value of environment variables from WASM using public API.

Attachments:

In an example below “Is in RTC” is 1 (even though the sim is not in RTC), “Is Aircraft” is 1 (even though I’m in Avatar) and simrate is 0 (impossible). “Camera state”, which is A:var, not E:var, works correctly.

Also one gauge update roughly every second shows some simvars at zero, while “E:Simulation Rate” jumps to impossible value.

Screenshot 2025-09-09 120701
Screenshot 2025-09-09 1207011074×707 221 KB

2

@FlyingRaccoon this would explain why my WASM stops working…

So following.. I can send a WASM sample tonight if you guys require it? please advise.

Best,
Raul

3

Hello !

There is indeed an issue with the access to Environment Var. The fix I’m working on should correct the issue for all environment variables.
Sorry for the inconvenience

Best Regards,
Edalyn

6 Likes
4

Hello @some1

This should be fixed in the latest version of SU4 beta.
Let us know if this fixes your problem.

Regards,
Sylvain

5

Yes, this looks fixed.

Unfortunately 1.6.7 broke something else in our other aircraft that did not use E: vars at all. But that’s an issue for another topic once I find the time to investigate it.