Crash on Robots Copying Item Elevators

[YurgenJurgensen]

Encountered this crash when copying an Elevator over another Elevator, couldn't replicate:

"The mod Subsurface - build beneath your base! (1.1.9) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Subsurface::on_robot_built_entity (ID 17)
New neighbour of linked belt has to be of opposite type
stack traceback:
[C]: in function 'connect_linked_belts'
Subsurface/scripts/elevators.lua:217: in function 'elevator_built'
Subsurface/control.lua:580: in function <Subsurface/control.lua:544>"

[NathaU]

You mean when fast-replacing? YurgenJurgensen ***@***.***> schrieb am Do. 7. Aug. 2025 um 20:09:

…

*YurgenJurgensen* created an issue (NathaU/factorio-subsurface#41) <#41> Encountered this crash when copying an Elevator over another Elevator, couldn't replicate: "The mod Subsurface - build beneath your base! (1.1.9) caused a non-recoverable error. Please report this error to the mod author. Error while running event Subsurface::on_robot_built_entity (ID 17) New neighbour of linked belt has to be of opposite type stack traceback: [C]: in function 'connect_linked_belts' *Subsurface*/scripts/elevators.lua:217: in function 'elevator_built' *Subsurface*/control.lua:580: in function <*Subsurface*/control.lua:544>" — Reply to this email directly, view it on GitHub <#41>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ARG36M42IXIIDJ7GI5ZVFQL3MOI5RAVCNFSM6AAAAACDLXSKACVHI2DSMVQWIX3LMV43ASLTON2WKOZTGMYDCNBTHA3DQOA> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[YurgenJurgensen]

I believe so. A bot did it offscreen while I wasn’t watching, so I don’t have the exact circumstances.

[NathaU]

Do you have by chance multiple item elevators placed next to each other without gap?

[YurgenJurgensen]

I think so. I was moving four parallel bus lanes between surfaces.