# Missing models?

**URL:** <https://www.ruby-forum.com/t/missing-models/71597>\
**Category:** Engines\
**Created:** [October 10, 2006, 6:59am UTC](https://www.ruby-forum.com/t/missing-models/71597 "2006-10-10T06:59:39Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![murfhy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/d26b3c/32.png) [@murfhy](https://www.ruby-forum.com/u/murfhy)\
**Post date:** [October 10, 2006, 6:59am UTC](https://www.ruby-forum.com/t/missing-models/71597/1 "2006-10-10T06:59:39Z")

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I’m running into a problem to where I’m getting undefined constants for  
certain models which are in my engine’s models directory. When I copy  
these  
same models into the app/models directory of the application I’m trying  
to  
use the engine with, they work. Some models, however, do seem to work  
with  
the engine (i.e. I get undefined constants if I delete these models out  
of  
the Engine’s app/models directory)

I have no idea why this would be happening. Has anyone encountered  
anything  
like this?