My problem
Trains don't work and i have no idea why. I have 2 very short and almost identical railroads, one works, one doesn't. There isn't a clear and understandable reason for this, and the dashboard isn't mad at me, so i really can't see any way to identify the issue and figure out how to fix it. Later i built another small road with just 2 stations in a survival world and it just doesn't work at all. The dashboard says it can't find a path from the depot to the first station, but they're linked properly, and once again i don't understand what the issue is.

My solution
A dashboard with an assortment of tools for troubleshooting and possibly (i'd really like this option) an option to manually construct a path by linking rail nodes that the dashboard would accept wothout a question. Tools should at least consist of a log of a path creation to see where and why it fails (or doesn't), a path viewer that would outline where and how trains navigate and a measuring tool to make sure trains fit. Also, among those tools, i'd like to see an option to manually control a train with no restrictions, because now to my understanding there must be a path that the train should be able to follow automatically, but since this doesn't work, at least let me drive it manually.

Additional Information
These tools could help identify bugs and possibly even find workarounds. I think a lot of players would benefit from their existence, and they could be a very helpful learning tool to understand the logic of the trains better.

Share your world and I bet I can find the issue in 5 seconds.

This has probably fixed in 4.0.0. Please verify and reopen this issue as needed.