Trains get removed from request schedule due to bug

I found no train limits worked for trains with multiple inputs, as everytime it did happen the station was slot capped.

galdo145 [discord] wrote:

Based on the discussion, it seems like the real problem is that during a repathing update the train loses its destination, and cant re-find it due to...

mostly agree. for some reason the train gets removed from the requesting station schedule, another train gets inserted, and the bugged train gets "lost"

This only occurs with stations that have an enable condition, right? A station always accepting trains never shows, right?

raciper [discord] wrote:

I found no train limits worked for trains with multiple inputs, as everytime it did happen the station was slot capped.

That's actually a very interesting data point, read this
(this used to be true at least): https://discord.com/channels/803508556325584926/803519296864518184/1384594353053503539

galdo145 [discord] wrote:

This only occurs with stations that have an enable condition, right? A station always accepting trains never shows, right?

it only ever happens at this specific supply station

I have like 7 other rock supply stations all feeding rock demand

so its something unique about this specific station

and I've tried demolishing and rebuilding the station completely, no dice

Does the station have an enable condition, eg modules all full?

see picture, yes

I have 30 supply stations for all raw ores running all modules full

and this is the only station where the bug appears

Seems the slot cap is capible of stopping a train in its tracks, but not arrival conditions.

eryk500 [discord] wrote:

That's actually a very interesting data point, read this

TLDR: the train distribution logic changes (or at least used to),
based on wether or not one had train limits set in any station
with-in a train "line"'s "stop" (a.k.a. station group).

if you set a request threshold higher t han the supply at the station, the train should still reach the station and wait there until it is full and can depart

this works great and helps increase throughput on large train networks

If you remove limits the station will request ALL the trains when the station is empty, I have that issue with my 16 water trains.

I now build things that need water near water

It may not work well, but try removing the request train only if, and limit to 1 train (2 if you have stacker space) based on all the discussion it seems like the problem may be that during recalc the train station fails that condition and a bug removes the train from pathing

well just deleting the station and running off of the other one I've built next to it is the ultimate solution

raciper [discord] wrote:

If you remove limits the station will request ALL the trains when the station is empty, I have that issue with my 16 water trains.

Yup, that's what I'm talking about.

If there are no limits anywhere, then trains
just get assigned to one station, as there's nothing
stopping them from picking just that one.

If there is at least one on some station,
the trains start getting allocated evenly.

But to the point, maybe the code that handles this
is responsible, that is my point.

but I'd like to supply the devs with as much information as possible

Trains will get a upgrade in U4, hoping for some upgrades in train handling.

But for now the shipping station group/recieving station group seems to be the way to go. This problem will persist with that.

well again none of my other stations present the bug - there's been a rock supply on the quartz mine running 3 request for like 1000 years

hasn't presented an issue there a single time

so for whatever reason it's this specific location

idk why

maybe the distance does come into play

as there are further distance rock mines, but they are low throughput

slopth [discord] wrote:

https://drive.google.com/file/d/1B4v5BnaD5l83Mm_8o8PkYqSezUCBGuDl/view?usp=drive_link

So will this save reproduce the error if I run it forward, or is it in an already broken state?

I can't get it to be predictable I'm sorry. I've been unsuccessful at an auto save replicating the issue which happened

Anytime I load them up, it just doesn't happen

"I think that I might have jinxed us": Trains get removed from request schedule due to bug