Services Spotlight:

How to solve "cannot load such file -- rack/handler/0"

Written By Corlew Solutions
Updated September 6, 2016
Published August 25, 2016
Why Corlew Solutions?

We write great software and provide amazing technical support. Contact us today if you need help with a software project:

  • Website: Send an inquiry
  • Email:

Article Technology Info

This article discusses the following technologies:

  • Ruby on Rails - An open source web application framework written in Ruby.
    (website | docs)

If you get an error that looks like

.../lib/rack/handler.rb:75:in `require': cannot load such file -- rack/handler/0 (LoadError)

make sure you’re starting your Rails server correctly. You may be doing

rails s -b 0 0 0 0

instead of

rails s -b

We hope you found this article useful. If you see any mistakes, missing features or ways to improve it, please let us know in the comments below so we can update its contents. If you're willing to link to us, we would sincerely appreciate it!

Corlew Solutions is a Web Design and Web Application Development company based in Fairfax Virginia, minutes away Washington D.C. If you're looking for great web design from the Northern Virginia area or web design from the Washington D.C. area we can help. Contact Us today!

comments powered by Disqus