I need help with a train

[Tomigambi]

Hello, in my factorio game i am making a simple one way train, it has 2 locomotives on each end and two cargo wagons, if i try to go from the mining outpost train stop to the train stop in my base it works but when i want to go from the base to the outpost it says No path, i dont really know why, thanks

[Loewchen]

Have you signaled the track to be two way or not signaled at all? Do you have the stations on the right side of the track?

[Nidan]

a simple one way train, it has 2 locomotives on each end and two cargo wagons

If you can answer Loewchen's questions with "yes": Are all four(?) locomotives oriented the same way? If so, are there tracks allowing the train to turn around? (An automatic train will never drive backwards; if it needs to go both ways, there must be at least one locomotive facing each direction.)

[Tomigambi]

Have you signaled the track to be two way or not signaled at all? Do you have the stations on the right side of the track?

thanks! it was the stations, one was in the left side