V1.117 (162952) broke ERG on iOS until full reinstall — Tacx Flux S

[Oleksandr_Biletskyi (Oleksandr)]

Posting as FYI in case others hit this after updating to 1.117.0 (build 162952).

After the update, ERG mode stopped holding target power in workouts on my iPad (iOS) with a Tacx Flux S — the trainer no longer adjusted resistance to the interval target. Setup had worked fine for a long time before this.

Things that did not help: toggling Bluetooth, recalibration/spindown, fully unpairing and re-pairing all functions (Power / Controllable / Cadence) in Zwift, power-cycling the trainer. ERG also worked perfectly the whole time in the Tacx Training app, with the latest firmware — so it was clearly on the Zwift side, not the trainer.

What fixed it: a full uninstall + reinstall of the Zwift app. ERG holds target power normally again after that.

Looks like the 1.117 update left some local Zwift data/config in a bad state that a normal update didn’t clear — a reinstall did. Might be worth a look so others don’t have to reinstall to recover ERG.

[GlennVL (Glenn)]

I’m getting a different but possibly related issue. It also seems to have to do with configuration files that are incorrect after the v1.117 update.

@GlennVL

There’s a LOT of spam about creating the zwift directory in the logs though (and I mean a lot, the log file is 350.000 lines long from being on the zwift home screen for about 4 minutes). Which doesn’t make sense since that directory exists and has the right permissions (confirmed manually and also evidenced by the prefs.xml file working correctly).

[9:12:24] Downloader::EnsurePath: Failed to create directory "C:\users\user\AppData\Local\Zwift". Error code: 4390 (unknown error). 

[9:12:24] ENSUREPATH_PROBE platform=pc raw="C:\users\user\AppData\Local/Zwift/MapSchedule_v2.xml" parent="C:\users\user\AppData\Local\Zwift" parent_empty=0 raw_relative=0 has_forward_slash=1 has_backslash=1

This issue started with zwift v1.117

[GlennVL (Glenn)]

@Oleksandr_Biletskyi Is Zwift still using AppData/Local/Zwift to store its data on your device? Or did it revert to using Documents/Zwift?

[Paul_Southworth (Paul)]

He’s on an iPad so there’s no visibility into the local state data or its location AFAIK