Cannot release the brakes on the "Lignes de l'Ouest Parisien" route

[Quacking Duck]

I have been trying the "Lignes de l'Ouest Parisien" route[1] which includes its own locomotives, rolling stock, consists, and activities. It appears that, despite moving the brake controller to the "quick release" position, I cannot release the brakes on any of the provided consists. The "EQ" pressure rises to 5 bar, but the brake cylinder pressure never decreases. Instead, it appears that a constant flow of approximately 31L/s occurs.

There is only one circumstance in which I have ever succeeded in releasing the brakes: when the locomotive is alone, with nothing coupled to it. I have also tried custom consists with the locomotive coupled to some coaches but without a cab car, as I suspected that the cab car was an important part of the problem, but found that those consists experienced the problem just like the provided consists with cab cars.

What may be the cause of this problem? What should I do next to diagnose it?

Attached is a screenshot with various information which I suspect to be relevant.
Screenshot 2025-08-01 102244.png

There are some PDF documentation files which are unpacked by the installer, but there appears to be a file size limit for non-image files which prevents me from attaching them here.

[1] https://www.funtrain.net/lines/view/70

[pschlik]

TrainPipeLeakRate is probably set too high, you can edit the engine to lower the leak rate or enable ‘correct questionable braking parameters’ to automatically limit the leak rate (as long as you are on a new enough version, that’s a newer feature).

[duboc]

Yes, on this rolling stock and others frenchs engines, this value is set too high. In France, the max leaking is 0.3 bar/mn or 0.005 bars/s.

Regards
Jean-Marc

[Quacking Duck]

Turning the "correct questionable braking parameters" setting on has succeeded in making it possible to release the brakes. Thank you.

I continue to have other problems with this route and these trains. For example, the throttle on the Z-50000 class electric multiple units seems to move itself to zero in certain locations with no visible reason, and there occur KVB interventions inconsistent with the stated speed limit. The playability of the provided scenarios therefore remains limited. These problems all appear to be associated with train control scripts, as they disappear when the setting to use those scripts is turned off. Should I discuss these problems in a separate thread?

[duboc]

For the throttle, sometimes I have this mystery only with OR.

A problem between the signalling script and the TCS script in this route. Unfortunately, RM77, the author of the signaling script passed away in 2022. I don't know if someone work to correct this problem.

[Quacking Duck]

I have resolved some of the TCS script issues by replacing all references to the "TCS_France" script with "TCS_France_V2", which adds compatibility with this route[1].

Annoyingly, even after applying this fix, the TCS appears to become broken upon loading a saved game. After loading a saved game, there occurs a KVB warning at 35 km/h and a KVB intervention at 40km/h regardless of actual speed limits. Do you know anything about this?

As far as I understand, the Z-50000 has its own TCS script at path "SNCF_Z50000_CDR\SCRIPT\TCS_France.cs". This does not appear to closely resemble any of the 3 scripts (Old_TCS_France, TCS_France, or TCS_France_V2) from Github. Could that script be causing the throttle reductions? It tends to happen when trying to depart from a station. Is there some button that I have to press before I am allowed to start moving?

[1] https://github.com/Sharpe49/OpenRail...d5f6f294df403d