when using with OARC mod in multiplayer server, this error happens

Error while running event yet_another_train_manager::on_nth_tick(60)
__yet_another_train_manager__/scripts/tools.lua:75: attempt to index local 'player' (a nil value)
stack traceback:
    __yet_another_train_manager__/scripts/tools.lua:75: in function 'get_vars'
    __yet_another_train_manager__/scripts/ui/frame.lua:496: in function 'handler'
    __yet_another_train_manager__/scripts/tools.lua:317: in function 'previous'
    __yet_another_train_manager__/scripts/tools.lua:316: in function <__yet_another_train_manager__/scripts/tools.lua:315>

this isn't happening in singleplayer mod.
to reproduce:

1. use space-age, yatm, oarc
2. generate map in singleplayer mod, and copy to dedicated server <- required!! creating map in dedicated server won't create above error
3. start server
4. login to server then above error will shown

Should be fixed in 1.0.12. I have not fully tested your configuration. Let me know if it is ok.

I played for ~3 hours and it runs without any problem. thank you!

I got another crash

 153.668 Error MainLoop.cpp:1508: Exception at tick 12028994: The mod Yet another train manager (1.0.12) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event yet_another_train_manager::on_gui_click (ID 1)
Only callable on choose-elem-button.
stack traceback:
    [C]: in function '__index'
    __yet_another_train_manager__/scripts/ui/frame.lua:537: in function 'handler'
    __yet_another_train_manager__/scripts/tools.lua:452: in function 'previous'
    __yet_another_train_manager__/scripts/tools.lua:302: in function <__yet_another_train_manager__/scripts/tools.lua:301>
 153.668 Error ServerMultiplayerManager.cpp:84: MultiplayerManager failed: "The mod Yet another train manager (1.0.12) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event yet_another_train_manager::on_gui_click (ID 1)
Only callable on choose-elem-button.
stack traceback:
    [C]: in function '__index'
    __yet_another_train_manager__/scripts/ui/frame.lua:537: in function 'handler'
    __yet_another_train_manager__/scripts/tools.lua:452: in function 'previous'
    __yet_another_train_manager__/scripts/tools.lua:302: in function <__yet_another_train_manager__/scripts/tools.lua:301>"

it's happening when I click the item icon in YATM - events tab
save zip file: https://drive.google.com/file/d/179UKkeX6IFe9f4nrFNbBLbiWw2TkllQ6/view?usp=sharing

Thanks for report. Should be fixed in 1.0.13.

thank you! however I got another crash error

29961.509 Error MainLoop.cpp:1508: Exception at tick 15583422: The mod Yet another train manager (1.0.13) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event yet_another_train_manager::on_train_changed_state (ID 29)
__yet_another_train_manager__/scripts/train_manager.lua:550: attempt to index local 'delivery' (a nil value)
stack traceback:
    __yet_another_train_manager__/scripts/train_manager.lua:550: in function <__yet_another_train_manager__/scripts/train_manager.lua:322>
29961.509 Error ServerMultiplayerManager.cpp:84: MultiplayerManager failed: "The mod Yet another train manager (1.0.13) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event yet_another_train_manager::on_train_changed_state (ID 29)
__yet_another_train_manager__/scripts/train_manager.lua:550: attempt to index local 'delivery' (a nil value)
stack traceback:
    __yet_another_train_manager__/scripts/train_manager.lua:550: in function <__yet_another_train_manager__/scripts/train_manager.lua:322>"

in this case I don't know why exactly it happened, so I can't share reproducible step sorry :(
I'll let you know when I find the way or if I get another issue.

save file: https://drive.google.com/file/d/1-CVIUKZp7O4yX_1omBU6NNjeIXOjBYA8/view?usp=sharing

to reproduce: do one of these actions
- remove YATM device on (1286, -157)
- remove train attached to the above YATM device
- load item following the below image

https://imgur.com/a/uG7xplE

however, destroying train (using gun, not just removing) doesn't crash and work fine

Should be fixed in 1.0.14. I cannot reproduce the crash so let me know if it is ok.

works well, thanks!