The mod Realistic Reactors (3.0.0) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event RealisticReactors::on_pre_player_mined_item (ID 11)
__RealisticReactors__/scripts/heat/network.lua:249: attempt to index local 'position' (a nil value)
stack traceback:
	__RealisticReactors__/scripts/heat/network.lua:249: in function 'callback'
	__RealisticReactors__/scripts/heat/math.lua:165: in function <__RealisticReactors__/scripts/heat/math.lua:145>
	(...tail calls...)
	__RealisticReactors__/scripts/heat/network.lua:285: in function 'callback'
	__RealisticReactors__/scripts/heat/math.lua:152: in function <__RealisticReactors__/scripts/heat/math.lua:145>
	(...tail calls...)
	__RealisticReactors__/scripts/heat/network.lua:285: in function 'callback'
	__RealisticReactors__/scripts/heat/math.lua:155: in function <__RealisticReactors__/scripts/heat/math.lua:145>
	(...tail calls...)
	__RealisticReactors__/scripts/heat/network.lua:285: in function 'callback'
	__RealisticReactors__/scripts/heat/math.lua:155: in function <__RealisticReactors__/scripts/heat/math.lua:145>
	(...tail calls...)
	__RealisticReactors__/scripts/heat/network.lua:285: in function 'callback'
	__RealisticReactors__/scripts/heat/math.lua:155: in function <__RealisticReactors__/scripts/heat/math.lua:145>
	(...tail calls...)
	...
	__RealisticReactors__/scripts/heat/math.lua:152: in function <__RealisticReactors__/scripts/heat/math.lua:145>
	(...tail calls...)
	__RealisticReactors__/scripts/heat/network.lua:285: in function 'callback'
	__RealisticReactors__/scripts/heat/math.lua:152: in function <__RealisticReactors__/scripts/heat/math.lua:145>
	(...tail calls...)
	__RealisticReactors__/scripts/heat/network.lua:285: in function 'callback'
	__RealisticReactors__/scripts/heat/math.lua:152: in function <__RealisticReactors__/scripts/heat/math.lua:145>
	(...tail calls...)
	__RealisticReactors__/scripts/heat/network.lua:285: in function 'move_entities'
	__RealisticReactors__/scripts/heat/network.lua:371: in function 'split_heat_network_cell'
	__RealisticReactors__/scripts/heat/network.lua:533: in function 'remove_entity_from_network_cell'
	__RealisticReactors__/scripts/heat/network.lua:617: in function 'remove_reactor'
	__RealisticReactors__/scripts/events/destruct.lua:110: in function 'entity'
	__RealisticReactors__/control.lua:61: in function <__RealisticReactors__/control.lua:59>