# Ultrasphinx::UsageError (Invalid class name "Place")

**URL:** <https://www.ruby-forum.com/t/ultrasphinx-usageerror-invalid-class-name-place/165019>\
**Category:** Rails\
**Created:** [April 8, 2009, 10:00am UTC](https://www.ruby-forum.com/t/ultrasphinx-usageerror-invalid-class-name-place/165019 "2009-04-08T10:00:48Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![marshluca](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/8baadc/32.png) [@marshluca](https://www.ruby-forum.com/u/marshluca)\
**Post date:** [April 8, 2009, 10:00am UTC](https://www.ruby-forum.com/t/ultrasphinx-usageerror-invalid-class-name-place/165019/1 "2009-04-08T10:00:48Z")

</div>

Hi, all …

My application can run normally on development environment ,but  
when i change it to production, I got the problem below:

Ultrasphinx::UsageError (Invalid class name “Place”):  
/vendor/plugins/ultrasphinx/lib/ultrasphinx/search/internals.rb:88:in  
`build _request_with_options' /vendor/plugins/ultrasphinx/lib/ultrasphinx/search/internals.rb:85:in`map’  
/vendor/plugins/ultrasphinx/lib/ultrasphinx/search/internals.rb:85:in  
`build _request_with_options' /vendor/plugins/ultrasphinx/lib/ultrasphinx/search.rb:333:in`run’

The Ultrasphinx configure , index and daemon:start all seem to have  
gone.

Does anyone have an idea on this ?

Thanks in advance.