Engine Error - happend when i was ordering my party to attack

release-553 (x64)
…onehearth/components/building/building_component.lua:328: attempt to index local ‘entity’ (a nil value)
stack traceback:
radiant/modules/common.lua:237: in function 'report_traceback’
radiant/modules/common.lua:248: in function <radiant/modules/common.lua:242>
…onehearth/components/building/building_component.lua:328: in function ‘_trace_entity’
…onehearth/components/building/building_component.lua:123: in function ‘_restore_structure_traces’
…onehearth/components/building/building_component.lua:77: in function 'obj’
radiant/modules/events.lua:73: in function 'instance’
radiant/modules/events.lua:206: in function <radiant/modules/events.lua:200>
[C]: in function 'xpcall’
radiant/modules/common.lua:257: in function 'xpcall’
radiant/modules/events.lua:200: in function <radiant/modules/events.lua:171>

I got this when i was sending my party to attack.

this is on Alpha 16 steam sable and its vanilla

My PC:

Nividia Geforce 970
Intel core i 5

Hello @erille10

I think I have seen this error posted before. did it crash your game or were you able to close it and continue playing?

can you post your stonehearth.log file it might contain additional information that could point to the root cause that triggered this error.