PBS-Question

Carlo Ghega · Post by **Carlo Ghega** » 27 Apr 2007 19:42

Really trying to get along with PBS, read the manual as well as the signalling-guide, but am still not there. Confess that this is an experimantel game with the max of 32 cargos and a lot of grf's enabled, but I get this problem in nearly every game at one time. Routing-restrictions are enabled but not in use at any signal on Tours station.

Please help: Why is my train not entering the station?

(Already tried to destroy and rebuild rails and signal, with no change for the better on the long hand.)

Thank you very much for your efforts,

best regards

CG

(newgrf.cfg will be send on, if needed)

Rob · Post by **Rob** » 27 Apr 2007 20:52

I don't know why they don't get to the station, but I forced the first train through the signal, and now they all happily go on their merry way.

Carlo Ghega · Post by **Carlo Ghega** » 27 Apr 2007 21:12

Thank you for your fast answer!

Forcing them through, is also what I do, of course. Is going good for a short while, then the problem occures again - in the majorrity with the same train (Nr.7 in this case): Probably not the next time it passes, but usually very soon. Exchanging it with a new train doesn't change anything.

If it would only occure every 40 game-years it wouldn't bother me, but sadly this happens much more often.

All the more: Thank you for taking care,

best regards,

CG

The Irish · Post by **The Irish** » 27 Apr 2007 21:54

Could be that a train which reserves the track in the tunnel when entering from the right into the station, but then reverses back out toward the right does not "unreserve" the track in the tunnel.

There is a bug like this with bridges, maybe it's the same with tunnels?

Carlo Ghega · Post by **Carlo Ghega** » 27 Apr 2007 22:55

Thanks for your interest, Irish!

Sounded really like a hopefully idea. I put a free rail-tile inbetween station, tunnel and signal: And indeed, the train enterded the station. Unfortunately, some soon time later, I endet up llike seen below (and known before).

Thx, nevertheless!

Best regards,

CG

wallyweb · Post by **wallyweb** » 27 Apr 2007 23:35

I think you need an entry signal going into that junction.

Carlo Ghega · Post by **Carlo Ghega** » 28 Apr 2007 00:52

Hi Wallyweb, thanks for trying to help!

Same thing like with the tiles: Get's the waiting train going, but ends in the same situation a little later.

Best regards,

CG

Rob · Post by **Rob** » 28 Apr 2007 04:29

Hmm, I think you found a bug in PBS.

I changed your difficulty setting "reverse at end of line and at stations" into "reverse at end of line only", and now the trains seem to go through like they are supposed to.

Pookey · Post by **Pookey** » 28 Apr 2007 06:02

Is that another Beta bug?

Carlo Ghega · Post by **Carlo Ghega** » 30 Apr 2007 18:16

Rob wrote:Hmm, I think you found a bug in PBS.

Do you think there is a chance to getting this fixed (whilst being very patient)? Should this thread be moved to the problem-section then? Or would this be somehow dispensable anyway?

Pookey wrote: Is that another Beta bug?

This is a nightly-game, but I had this problem too in 2,5 beta 8 and beta 9, a savegame can be posted if wanted.

Thank you once again for your efforts,

best regards,

CG

Pookey · Post by **Pookey** » 01 May 2007 07:43

Yes definitely report it in the 2.5 Beta discussion, especially if it is a Beta 9 bug. We don't want to have to have a revision released like last time.

Rob · Post by **Rob** » 01 May 2007 14:50

Indeed, always report these kind of things as bugs.

Btw, did changing that difficulty setting work for you too Carlo Ghega ?

Carlo Ghega · Post by **Carlo Ghega** » 01 May 2007 20:34

Rob wrote:Indeed, always report these kind of things as bugs.

Will do so now.

Rob wrote: Btw, did changing that difficulty setting work for you too Carlo Ghega ?

Yep - absolutely seems like you are right!

Best regards,

CG

Post by **WWTBAM** » 02 May 2007 02:26

you nly needed to post iut in the beta thread as all the beta fixes get merged into the alpha/nightlys

Carlo Ghega · Post by **Carlo Ghega** » 02 May 2007 16:48

Sorry for that - hadn't got that.

Thought it would be helpful to provide a certain report and savegame for each version of ttdp - not ment harsh in any way.

Apologies

CG

DaleStan · Post by **DaleStan** » 04 May 2007 04:05

It is, as roboboy said, not usually necessary to report a bug for both 2.5 and 2.6. However, too much information is almost always better than too little. Also, if you report it for 2.6 and then discover it also exists in 2.5, it's a very good idea to mention that, just in case whoever is fixing it doesn't notice.

Carlo Ghega · Post by **Carlo Ghega** » 04 May 2007 17:48

Thank you for taking time and pointing that out.

Best regards,

Carlo

wallyweb · Post by **wallyweb** » 13 Apr 2008 21:31

This is a question not related to the above problem other than it is PBS and it is a question. I don't think it's a bug unless somebody tells me otherwise.
In the attached png:
I would like to set up PBS signaling within the yellow loop.
However, all the combinations that I tried result in the signal in the red circle being deemed unsafe causing the train on that platform to become "stopped" when it tries to exit.
I've tried using pre-signals and combo signals and just about everything else available under the PBS banner.
Am I missing something here, or is PBS just plain impossible in this situation?

: unsafe_signal.png (91.7 KiB) Viewed 5277 times

AndersI · Post by **AndersI** » 14 Apr 2008 16:45

I don't know for sure and the semaphores are almost unknown to me, so it's difficult to see what you have there, is every signal leading into the block a PBS signal? Is every signal leading out of the block a PBS exit signal?

For no rational reason at all, I would begin with removing the two signals marked with a red X (it's just a feeling, no facts involved).

Wait a minute, is that a waypoint right outside the depot? But that is out of the PBS block...
And then there's a waypoint just outside the block on the down-right line...
I would experiment without the waypoints, I think.

: Example46.png (84.85 KiB) Viewed 5193 times

wallyweb · Post by **wallyweb** » 14 Apr 2008 19:19

AndersI wrote:I don't know for sure and the semaphores are almost unknown to me, so it's difficult to see what you have there, is every signal leading into the block a PBS signal? Is every signal leading out of the block a PBS exit signal?

All entry signals into that block should be PBS. The exit signals are not PBS as there is no need for path reservations beyond them.

For no rational reason at all, I would begin with removing the two signals marked with a red X (it's just a feeling, no facts involved).

The two signals you marked are necessary as they control access to a rail yard and prevent trains from going the wrong way.

Wait a minute, is that a waypoint right outside the depot? But that is out of the PBS block...
And then there's a waypoint just outside the block on the down-right line...
I would experiment without the waypoints, I think.

Those waypoints are outside the PBS block and should have no effect on events within the block.

Thanks AndersI. Your comments helped me to think this through and I have resolved the problem as follows:
1. The train does not go to "stopped" until it tries to reverse.
2. In my patch cfg, I changed the pathbasedsignalling.allowunsafereverse setting to on.
3. Now it works as expected. The train even waits until it finds a clear path to its next order.

So now the questions are:
1. Why would that platform be considered as unsafe for reversing?
2. Is this a bug or is it intended?
3. What could possibly go wrong now that I have changed the setting? ("Crash" is too simple and not an acceptable answer. Details, please.)

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