# Engine Error Popup (Text included)

**URL:** <https://discourse.stonehearth.net/t/engine-error-popup-text-included/31364>\
**Category:** Other Reports\
**Tags:** duplicate\
**Created:** [July 24, 2017, 6:05am UTC](https://discourse.stonehearth.net/t/engine-error-popup-text-included/31364 "2017-07-24T06:05:46Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Jesethea](https://avatars.discourse-cdn.com/v4/letter/j/a88e57/32.png) [@Jesethea](https://discourse.stonehearth.net/u/Jesethea)\
**Post date:** [July 24, 2017, 6:05am UTC](https://discourse.stonehearth.net/t/engine-error-popup-text-included/31364/1 "2017-07-24T06:05:46Z")

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**Summary:**  
I got the following error when creating a building:

release-737 (x64)  
…hearth/components/scaffolding/scaffolding\_region.lua:791: attempt to index field ‘\_owning\_scaffolding’ (a nil value)  
stack traceback: radiant/modules/common.lua:245: in function ‘report\_traceback’ radiant/modules/common.lua:256: in function \<radiant/modules/common.lua:250\> …hearth/components/scaffolding/scaffolding\_region.lua:791: in function ‘instance’ radiant/modules/events.lua:291: in function \<radiant/modules/events.lua:285\> [C]: in function ‘xpcall’ radiant/modules/common.lua:265: in function ‘xpcall’ radiant/modules/events.lua:285: in function \<radiant/modules/events.lua:251\> [C]: in function ‘destroy\_entity’ radiant/modules/entities.lua:83: in function ‘destroy\_entity’ stonehearth/services/server/build/ladder\_builder.lua:142: in function \<stonehearth/services/server/build/ladder\_builder.lua:123\> [C]: in function ‘destroy’ stonehearth/services/server/build/ladder\_manager.lua:71: in function ‘\_destroy\_builder’ stonehearth/services/server/build/ladder\_builder.lua:468: in function ‘\_check\_if\_valid’ stonehearth/services/server/build/ladder\_builder.lua:325: in function ‘\_update\_build\_mode’ stonehearth/services/server/build/ladder\_builder.lua:114: in function \<stonehearth/services/server/build/ladder\_builder.lua:113\>

This does not happen reliably, and I can’t reproduce it at this time.

**Steps to reproduce:**

1. Place multiple buildings to be built
2. Wait for error

**Expected Results:**  
Building built without error

**Actual Results:**  
Rare engine error pop-up

**Notes:**  
This has only happened once so far. Will update if I can get steps to repro 100%

**Attachments:**  
Error log in summary

**Version Number and Mods in use:**  
release-737 (x64)

**System Information:**  
PC, Win 10, laptop

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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:** [July 25, 2017, 2:03pm UTC](https://discourse.stonehearth.net/t/engine-error-popup-text-included/31364/2 "2017-07-25T14:03:31Z")

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A post was merged into an existing topic: [Engine error about scaffolding A19 & A20](https://discourse.stonehearth.net/t/engine-error-about-scaffolding-a19-a20/26145)

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<div class="post-metadata">

**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:** [July 25, 2017, 2:03pm UTC](https://discourse.stonehearth.net/t/engine-error-popup-text-included/31364/3 "2017-07-25T14:03:32Z")

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