# Assertion failed! - in function 'cover\_project\_region'

**URL:** <https://discourse.stonehearth.net/t/assertion-failed-in-function-cover-project-region/19187>\
**Category:** Resolved Reports\
**Tags:** resolved\
**Created:** [January 15, 2016, 11:42pm UTC](https://discourse.stonehearth.net/t/assertion-failed-in-function-cover-project-region/19187 "2016-01-15T23:42:47Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![KrDragon](https://avatars.discourse-cdn.com/v4/letter/k/f17d59/32.png) [@KrDragon](https://discourse.stonehearth.net/u/KrDragon)\
**Post date:** [January 15, 2016, 11:42pm UTC](https://discourse.stonehearth.net/t/assertion-failed-in-function-cover-project-region/19187/1 "2016-01-15T23:42:48Z")

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Engine Error. Doesn’t seem to cause an issue. Unsure why it started. Shows up on startup of this particular savegame. Will update if something happens that I think is related.

 ![](https://us1.discourse-cdn.com/flex022/uploads/stonehearth/original/3X/e/a/ea46327be5ff447381ffc5836bde11c52ee6d190.png)

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**Author:** ![8BitCrab](https://sea2.discourse-cdn.com/flex022/user_avatar/discourse.stonehearth.net/8bitcrab/32/48512_2.png) [@8BitCrab](https://discourse.stonehearth.net/u/8BitCrab)\
**Post date:** [January 15, 2016, 11:45pm UTC](https://discourse.stonehearth.net/t/assertion-failed-in-function-cover-project-region/19187/2 "2016-01-15T23:45:56Z")

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hey there @KrDragon, welcome to the discourse 😄

> [@KrDragon](#):
>
> Shows up on startup of this particular savegame.

would you perhaps be able to provide us with this savegame?

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**Author:** ![TurboTobi01](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@TurboTobi01](https://discourse.stonehearth.net/u/TurboTobi01)\
**Post date:** [February 15, 2016, 10:34am UTC](https://discourse.stonehearth.net/t/assertion-failed-in-function-cover-project-region/19187/3 "2016-02-15T10:34:46Z")

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```auto
release-489 (x64)
...th/services/server/build/scaffolding_builder_1d.luac:130: assertion failed!
stack traceback:
	radiant/modules/events.luac:84: in function <radiant/modules/events.luac:81>
	[C]: in function 'assert'
	...th/services/server/build/scaffolding_builder_1d.luac:130: in function '_cover_project_region'
	...th/services/server/build/scaffolding_builder_1d.luac:100: in function '_update_scaffolding_size'
	...th/services/server/build/scaffolding_builder_1d.luac:93: in function 'obj'
	radiant/modules/events.luac:44: in function 'instance'
	radiant/modules/events.luac:98: in function <radiant/modules/events.luac:96>
	[C]: in function 'xpcall'
	radiant/modules/events.luac:96: in function 'trigger'
	radiant/modules/events.luac:121: in function '_trigger_gameloop'
	radiant/modules/events.luac:150: in function '_update'
	radiant/server.luac:19: in function <radiant/server.luac:17>

```

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**Author:** ![Powerclank](https://sea2.discourse-cdn.com/flex022/user_avatar/discourse.stonehearth.net/powerclank/32/48934_2.png) [@Powerclank](https://discourse.stonehearth.net/u/Powerclank)\
**Post date:** [January 2, 2016, 5:01pm UTC](https://discourse.stonehearth.net/t/assertion-failed-in-function-cover-project-region/19187/4 "2016-01-02T17:01:50Z")

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Building problems are well known, the team are working on it 😉