Bug? Again brakes without effect! (No RTO, nor overheating)

Hi captains! 

Again I have an issue with the 77L brakes: Course of events: 

0. I cannot find a braking bug in

1. I flew ACA33 CYYZ-CYVR-YSSY and had *no* problem to brake before the take-offs and after the landings. 

2. Sitting at YSSY the random fault 'REPAIR ALL BRAKES' kicked in, and now it is unclear what we shall do, either or both of the following? 

2.1 Is it sufficient to clear this fault in PMDG SETUP/AIRCRAFT/FAILURES/WHEEL AND BRAKES? I cleared it here. Done. 

2.2 Shall we also use the option in FS ACTIONS/GROUND MAINTENANCE/REPLACE BRAKES? I did so additionally. The line greyed out. Done. 

3. After pushback for ACA34 YSSY-CYVR and taxiing to RWY34L I sensed: No braking action at all! Oh no, not again this one! 

4. I set the chocks on the taxiway (is it a prerequisite to work on the plane?), no problem to move the aircraft forward with only little thrust! 

5. Checking the faults again: No fault indicated! 

6. Repeating the ground maintenance: No effect! 

To me this is a bug,

since there is no indication of a malfunction, neither on the screens, nor in the PMDG menus of the FMS. 

The entire braking function does not work, even the chocks. 

Also it has *nothing* to do with the also discussed wrong sequence of cooling/fixing brakes/wheels:

I did *not* perform an RTO, *nor* there was a brake overheating. 

(See http://forum.avsim.net/topic/422870-repairing-wheels-and-brakes-issue/ )

Please advise, and thanx in advance. 

(A solution would be nice before I land in CYVR...   8^)