# Engine failure bug

**URL:** <https://discourse.stonehearth.net/t/engine-failure-bug/22071>\
**Category:** Previous Build Reports\
**Created:** [May 11, 2016, 7:56pm UTC](https://discourse.stonehearth.net/t/engine-failure-bug/22071 "2016-05-11T19:56:36Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Gahria](https://avatars.discourse-cdn.com/v4/letter/g/35a633/32.png) [@Gahria](https://discourse.stonehearth.net/u/Gahria)\
**Post date:** [May 11, 2016, 7:56pm UTC](https://discourse.stonehearth.net/t/engine-failure-bug/22071/1 "2016-05-11T19:56:36Z")

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release-549 (x64) std::logic\_error: ‘invalid reference in native get\_id’ stack traceback: [C]: ? [C]: in function ‘get\_id’ radiant/modules/entities.lua:301: in function ‘get\_world\_grid\_location’ …rth/services/server/build/scaffolding\_builder\_2d.lua:186: in function ‘\_create\_builders’ …rth/services/server/build/scaffolding\_builder\_2d.lua:171: in function ‘\_on\_project\_changed’ …rth/services/server/build/scaffolding\_builder\_2d.lua:129: in function \<…rth/services/server/build/scaffolding\_builder\_2d.lua:128\>

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**Author:** ![Relyss](https://sea2.discourse-cdn.com/flex022/user_avatar/discourse.stonehearth.net/relyss/32/41785_2.png) [@Relyss](https://discourse.stonehearth.net/u/Relyss)\
**Post date:** [May 12, 2016, 5:50pm UTC](https://discourse.stonehearth.net/t/engine-failure-bug/22071/2 "2016-05-12T17:50:39Z")

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Hello @Gahria, could you explain a bit what was happening in the game when you got this error?  
It seems related to the scaffolding, but we would need more information in order to reproduce it.

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**Author:** ![Gahria](https://avatars.discourse-cdn.com/v4/letter/g/35a633/32.png) [@Gahria](https://discourse.stonehearth.net/u/Gahria)\
**Post date:** [May 12, 2016, 8:07pm UTC](https://discourse.stonehearth.net/t/engine-failure-bug/22071/3 "2016-05-12T20:07:38Z")

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that error came up when i was building my new house that i have just made, it was fully decorated and it seem when the beds was placed inside the house, the builder can’t finish placing the lantern above the beds.