La mod Whistle Stop Factories ha causato un errore non recuperabile.
Se possibile riporta l'errore all'autore della mod.

Error while running event WhistleStopFactories::on_chunk_generated (ID 12)
La mod Solar Walls ha causato un errore non recuperabile.
Se possibile riporta l'errore all'autore della mod.

Error while running event SolarWalls::script_raised_built (ID 77)
SolarWalls/control.lua:33: attempt to index field 'created_entity' (a nil value)
stack traceback:
SolarWalls/control.lua:33: in function <SolarWalls/control.lua:32>
stack traceback:
WhistleStopFactories/scripts/spawnFactory.lua:30: in function 'spawn'
WhistleStopFactories/control.lua:85: in function <WhistleStopFactories/control.lua:52>
stack traceback:
[C]: in function 'raise_event'
WhistleStopFactories/scripts/spawnFactory.lua:30: in function 'spawn'
WhistleStopFactories/control.lua:85: in function <WhistleStopFactories/control.lua:52>

Even though this appears to be an issue with SolarWalls (they should be using entity not created_entity), I've put together a fix that will stop this from happening. Please upgrade to 0.1.15 which has the fix.

Thank you for reporting it!

Thanks!