# \[new builder\] Error message popping up when building was almost done

**URL:** <https://discourse.stonehearth.net/t/new-builder-error-message-popping-up-when-building-was-almost-done/34638>\
**Category:** Bug Reports\
**Tags:** new\_builder\
**Created:** [April 19, 2018, 7:28pm UTC](https://discourse.stonehearth.net/t/new-builder-error-message-popping-up-when-building-was-almost-done/34638 "2018-04-19T19:28:35Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![SachielMF](https://sea2.discourse-cdn.com/flex022/user_avatar/discourse.stonehearth.net/sachielmf/32/26155_2.png) [@SachielMF](https://discourse.stonehearth.net/u/SachielMF)\
**Post date:** [April 19, 2018, 7:28pm UTC](https://discourse.stonehearth.net/t/new-builder-error-message-popping-up-when-building-was-almost-done/34638/1 "2018-04-19T19:28:35Z")

</div>

Didn’t expect them to finish it but everything went fine. Or so it seemed when suddenly:

release-823 (x64)  
…s/client/building\_vision/building\_vision\_service.lua:221: attempt to call method ‘get\_normal’ (a nil value)  
stack traceback:  
[C]: in function ‘get\_normal’  
…s/client/building\_vision/building\_vision\_service.lua:221: in function ‘renderer\_changed’  
…ices/client/widget/fixture\_renderer\_tag\_renderer.lua:7: in function \<…ices/client/widget/fixture\_renderer\_tag\_renderer.lua:4\>

 ![screenshot%202018_04_19__21_24_41](https://us1.discourse-cdn.com/flex022/uploads/stonehearth/original/3X/f/1/f145b95a0190370b44ff452e90f5fcfabb2771c2.jpg)

[1524165889510.7z](https://discourse.stonehearth.net/uploads/short-url/7xw2GaoykB4VXK35yQWFeAHgnFk.7z) (3.2 MB)