I was checking through a few different caves (was on to my 3rd) and encountered this error while revealing a new tunnel with my bots:
The mod Warp Drive Machine (1.0.12) caused a non-recoverable error.
Please report this error to the mod author.
Error while running event Warp-Drive-Machine::on_robot_pre_mined (ID 18)
value for required parameter 2 (center) is missing
stack traceback:
[C]: in function 'find_non_colliding_position'
Warp-Drive-Machine/control-caves.lua:561: in function 'CreateRuinsRoom'
Warp-Drive-Machine/control-caves.lua:505: in function 'create_room_on_direction'
Warp-Drive-Machine/control-caves.lua:445: in function 'create_tunnel_on_direction'
Warp-Drive-Machine/control-caves.lua:286: in function 'check_for_tunnel'
Warp-Drive-Machine/control-caves.lua:251: in function 'diggy_hole'
Warp-Drive-Machine/control-caves.lua:217: in function 'CAVE_player_mined_entity'
Warp-Drive-Machine/control.lua:2273: in function <Warp-Drive-Machine/control.lua:2261>