120.1.3 - assertion failed after creating underwater rail line.

[ankit.karan99]

got this error (attached image) after creating underwater rail line.

system info :
simutrans-sdl 120.1.3 (precompiled), pak128 2.6 + addons, win7 32 bit , Intel celeron n2940 1.83 GHz x 4, Intel hd graphics gen7, 2gb ram, 768 mb vram.

[prissi]

Do you play as the active AI, i.e. the AI is active and you are building too?

[ankit.karan99]

No, I was playing as public player.

[prissi]

Then this may be an AI error, when it thinks it has found a suitable place but then the stop disappears before it can be built. I fail to see how this could connect with a tunnel.

[ankit.karan99]

I fail to see how this could connect with a tunnel.

I am saying about tunnel because this error came up after what I did. may be this error is related to other things.