Secondary stop signals are now set up in the station editor. Are you setting up stop selection signals in the station editor?

Thank you, that would be it!

Out of interest, with the new Secondary stop signals, would it now accept a behind platform? (Below... S = Signal, SS Secondary Signal, = Track) So allow to fill all platforms as per below?

SS ===== S < Platform 1A > S == S < Platform 1B ||
S < Platform 2A > S == S <Platform 2B ||

I don't fully understand your diagram, but you seem to be implying having signals between the stop selection signal and the platform area? This is not supported and has never been supported. Signals not being able to reserve from the point of the signal to the stop means other signals could try to also pick the same platform.

If you are trying to stop multiple trains in the same platform, there's now official support for this in 1.16: create an oversized advanced stop (keep going after the second click to the end of the platform), then set up your stop selection signal to not "check beyond stops". Remove all extra signals inside the platform, these will disable the feature. If there's enough space behind stopped trains the signal will allow more trains to enter the stop.

Really interested with this but I'm doing something wrong. I have...
- Created an extra long platform (280m, train length 120m) in a depot
- From my station to the depot I have a signal set up NOT check beyond stops
- This is set as my secondary platform signal in station editor
- In the line editor I've made my main platform the full length of the depot long platform
- and a secondary platform as 140m down
- Have no signals in the platform

Once the full length is full, I get a red light blocking the secondary. Any ideas?

Originally posted by ianmmanson:

Really interested with this but I'm doing something wrong. I have...
- Created an extra long platform (280m, train length 120m) in a depot
- From my station to the depot I have a signal set up NOT check beyond stops
- This is set as my secondary platform signal in station editor
- In the line editor I've made my main platform the full length of the depot long platform
- and a secondary platform as 140m down
- Have no signals in the platform

Once the full length is full, I get a red light blocking the secondary. Any ideas?

I presume your track is dead-end so trains have to reverse. In the use as depot you would want to have the order that brings the train into the depot be the final order of the shift ("not continue"). This takes the train off shift and it no longer reserves track for its next move (which would otherwise be to leave the depot). If the 1st train is not off-shift, this is why you get the red light - because the 2nd train sees the reservation from the 1st train in the place where it's supposed to park. (What "check beyond stop" flag does is it allows the 2nd train to proceed even though the 1st train is occupying the front portion of the platform - because the 2nd train does not check past where it needs to stop - but it does check the area where it needs to stop and since it's reserved by the 1st train, it is stopped).

So two options - (1) put the 1st train off-shift - it will come back to on-shift when it's next order should start presuming conditions are met, or (2) actually do a place a signal between the two trains' parking spots - this signal needs to have lens facing the 1st train, so it cuts the 1st train's reservation. (The point about not having signals is about not having balises or signals with lens facing the entrance/exit).

Note you do need a signal at the exit from the track in any case with lens facing the dead-end - because otherwise trains in this track (unless off-shift) will be reserving the nearby "mainline" i.e. their future exit path.