# engine error bug

**URL:** <https://discourse.stonehearth.net/t/engine-error-bug/36012>\
**Category:** Support\
**Created:** [June 15, 2018, 7:15am UTC](https://discourse.stonehearth.net/t/engine-error-bug/36012 "2018-06-15T07:15:35Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Josh\_Aholt](https://avatars.discourse-cdn.com/v4/letter/j/ce7236/32.png) [@Josh\_Aholt](https://discourse.stonehearth.net/u/Josh_Aholt)\
**Post date:** [June 15, 2018, 7:15am UTC](https://discourse.stonehearth.net/t/engine-error-bug/36012/1 "2018-06-15T07:15:35Z")

</div>

release-860 (x64)  
CHECK failed: C:\rb\ihome\root\SH-OB0-BUILD\stonehearth\source\lib\lua\ai\execution\_frame.cpp:193  
(223674 Amelia Baub) (task\_group:1330) bad frame transition to “add\_action” from “starting\_thinking”  
Culprit:  
frame: stonehearth:top  
unit: combat dispatcher  
compound: combat dispatcher  
frame: stonehearth:combat  
unit: solo combat unit control  
task\_group: solo combat unit control  
frame: task\_group:1330  
stack traceback:  
[C]: in function ‘?’  
stonehearth/services/server/threads/thread.lua:552: in function ‘\_dispatch\_messages’  
stonehearth/services/server/threads/thread.lua:414: in function \<stonehearth/services/server/threads/thread.lua:395\>  
[C]: in function ‘suspend’  
stonehearth/ai/actions/follow\_path\_action.lua:199: in function \<stonehearth/ai/actions/follow\_path\_action.lua:58\>  
[C]: ?  
[C]: ?  
[C]: ?  
[C]: ?  
[C]: in function ‘run’  
stonehearth/services/server/tasks/task\_action.lua:196: in function \<stonehearth/services/server/tasks/task\_action.lua:193\>  
…  
[C]: in function ‘run’  
stonehearth/components/ai/ai\_component.lua:534: in function \<stonehearth/components/ai/ai\_component.lua:518\>  
[C]: in function ‘xpcall’  
radiant/modules/commons.lua:73: in function ‘xpcall’  
stonehearth/components/ai/ai\_component.lua:518: in function ‘\_thread\_main’  
stonehearth/services/server/threads/thread.lua:277: in function \<stonehearth/services/server/threads/thread.lua:274\>  
[C]: in function ‘xpcall’  
radiant/modules/commons.lua:73: in function ‘xpcall’  
stonehearth/services/server/threads/thread.lua:274: in function ‘f’  
radiant/lib/env.lua:15: in function \<radiant/lib/env.lua:14\>

Page 2  
release-860 (x64)  
stack traceback:  
[C]: ?  
[C]: ?  
[C]: ?  
[C]: in function ‘run’  
stonehearth/services/server/tasks/task\_action.lua:196: in function \<stonehearth/services/server/tasks/task\_action.lua:193\>  
[C]: ?  
[C]: ?  
[C]: in function ‘run’  
…nehearth/services/server/tasks/task\_group\_action.lua:127: in function \<…nehearth/services/server/tasks/task\_group\_action.lua:115\>  
[C]: ?  
[C]: ?  
…  
[C]: in function ‘run’  
stonehearth/components/ai/ai\_component.lua:534: in function \<stonehearth/components/ai/ai\_component.lua:518\>  
[C]: in function ‘xpcall’  
radiant/modules/commons.lua:73: in function ‘xpcall’  
stonehearth/components/ai/ai\_component.lua:518: in function ‘\_thread\_main’  
stonehearth/services/server/threads/thread.lua:277: in function \<stonehearth/services/server/threads/thread.lua:274\>  
[C]: in function ‘xpcall’  
radiant/modules/commons.lua:73: in function ‘xpcall’  
stonehearth/services/server/threads/thread.lua:274: in function ‘f’  
radiant/lib/env.lua:15: in function \<radiant/lib/env.lua:14\>

---

<div class="post-metadata">

**Author:** ![max99x](https://sea2.discourse-cdn.com/flex022/user_avatar/discourse.stonehearth.net/max99x/32/40094_2.png) [@max99x](https://discourse.stonehearth.net/u/max99x)\
**Post date:** [June 15, 2018, 7:16am UTC](https://discourse.stonehearth.net/t/engine-error-bug/36012/2 "2018-06-15T07:16:52Z")

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Thanks for the report. This should be fixed on the unstable branch (Steam “latest”), but we currently have no plans to port that to the current stable release though.