# Cannot run rake on rails 3 beta 4

**URL:** <https://www.ruby-forum.com/t/cannot-run-rake-on-rails-3-beta-4/190305>\
**Category:** Rails\
**Created:** [June 17, 2010, 4:22pm UTC](https://www.ruby-forum.com/t/cannot-run-rake-on-rails-3-beta-4/190305 "2010-06-17T16:22:45Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![nbnbnb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/a87d85/32.png) [@nbnbnb](https://www.ruby-forum.com/u/nbnbnb)\
**Post date:** [June 17, 2010, 4:22pm UTC](https://www.ruby-forum.com/t/cannot-run-rake-on-rails-3-beta-4/190305/1 "2010-06-17T16:22:45Z")

</div>

I am running into a brick wall when trying out Rails 3 beta 4. I am  
getting this:

> rails new blog  
> cd blog  
> rake --trace

rake aborted!  
wrong argument type Symbol (expected Proc)  
/Users/me/.rvm/gems/ruby-1.8.7-p174/gems/railties-3.0.0.beta4/lib/  
rails/engine.rb:122:in `delegate’

I am running latest 10.5.x, fresh install of Ruby 1.8.7 (via rvm), and  
rails 3 beta 4.

What’s going on?