Not sure if I should post it here or at realistic reactors discussion ^^'
My guess was I should post it here because error happens after putting down Solar power tower.

Edit 1: Forgot to mark it as bug ^^'.

The mod Realistic Reactors (3.1.4) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event RealisticReactors::on_built_entity (ID 6)
big-data-string/unpack.lua:14: big data 'waterGhost-realistic-reactor-breeder-heat-buffer-connections' not defined!
stack traceback:
[C]: in function 'assert'
big-data-string/unpack.lua:14: in function 'bigunpack'
RealisticReactors/scripts/heat/buffer.lua:23: in function 'heat_buffer_prototype_connections'
RealisticReactors/scripts/heat/buffer.lua:40: in function 'f'
RealisticReactors/scripts/heat/util.lua:105: in function 'memo'
RealisticReactors/scripts/heat/buffer.lua:50: in function 'get_heat_buffer_prototype_connections'
RealisticReactors/scripts/heat/buffer.lua:55: in function 'get_heat_buffer_prototype_transitions'
RealisticReactors/scripts/heat/buffer.lua:74: in function 'index'
__RealisticReactors/scripts/heat/buffer.lua:83: in function 'heat_buffer_transitions'
RealisticReactors/scripts/heat/network.lua:488: in function 'add_entity_to_network_cell'
RealisticReactors/scripts/heat/network.lua:555: in function 'add_reactor'
RealisticReactors/scripts/events/construct.lua:101: in function 'entity'
RealisticReactors/control.lua:51: in function <RealisticReactors/control.lua:50>

Hi, yeah I have no clue what this would relate to/how that mod works, I'd post on their forums

Well than my guess was fairly bad. Will do and thanks for fairly quick response