Need help with correct rail signals placement

[SkyLight]

Hi. Currently I have main station and an outpost, which provides me ore. I placed a 2-head train to go from one location to another. When train goes from the outpost to main station, everything is fine. But when it tries to go back to outpost, it gets "No Path" all the time.

I have the following setup:

Outpost station

I have a small loading station here, just one track for both directions (train on the second track here is just a backup). Train should come from north (in the the top-left corner) and after loading it should go back to main station. I use two-headed setup, so there is no turn-around here.

One t-junction with main line

Just a simple junction to connect outpost branch (single track) with main line (two tracks). Outpost to the east, main base to the north.

Main station

Train goes from south, on the right track (I have right-sided movement) and chooses the station to dock. After unloading it should go back to outpost on the left track of main line.

What's confusing me here is that it shouw "No path" on the "tail" train, so I believe it tries to go back to the left and then down, which is incorrect, because train here should go to the right, then down and left, to the main line.

I was trying different signal setups but still can make the train go from main base to the outpost. So train goes normally from outpost to main base, but doesn't want to go back.

[Boogieman14]

You're missing a signal at the outpost. If a train is allowed to go in both direction, there needs to be a signal in both directions. As you have it set up now, the signals tell the train it's only allowed to leave the station, not go back in. Place a signal directly opposite the one at the outpost (so the existing one highlights in blue) and it'll probably work.

[SkyLight]

How could I miss that? Now it works, thanks.

[MisterSpock]

The train only sees signal right from him.