# "Unable to instantiate observers" !?

**URL:** <https://www.ruby-forum.com/t/unable-to-instantiate-observers/147104>\
**Category:** Rails\
**Created:** [August 28, 2008, 2:07pm UTC](https://www.ruby-forum.com/t/unable-to-instantiate-observers/147104 "2008-08-28T14:07:29Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ANSS](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/d78d45/32.png) [@ANSS](https://www.ruby-forum.com/u/ANSS)\
**Post date:** [August 28, 2008, 2:07pm UTC](https://www.ruby-forum.com/t/unable-to-instantiate-observers/147104/1 "2008-08-28T14:07:29Z")

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Hi,  
When I run ‘rake db:migrate’, I get this error message:  
“Unable to instantiate observers, some gems that this application  
depends on  
are missing. Run ‘rake gems:install’”\>  
When I run ‘rake gems:install’ as the error message suggests I get the  
very  
same above error !!

I googled the error message but I didn’t find any help …  
Any idea??