# Unable to install sexp gem

**URL:** <https://www.ruby-forum.com/t/unable-to-install-sexp-gem/130721>\
**Category:** Ruby\
**Created:** [March 2, 2008, 3:16pm UTC](https://www.ruby-forum.com/t/unable-to-install-sexp-gem/130721 "2008-03-02T15:16:48Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![vishy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/b487fb/32.png) [@vishy](https://www.ruby-forum.com/u/vishy)\
**Post date:** [March 2, 2008, 3:16pm UTC](https://www.ruby-forum.com/t/unable-to-install-sexp-gem/130721/1 "2008-03-02T15:16:48Z")

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Hi,  
I have ruby 1.8.6 installed on windows.  
I have downloaded sexp gem.  
I am trying to install the gem,but getting following error-

ERROR: While executing gem … (RuntimeError)  
Error instaling sexp-0.1.gem:  
sexp requires multi = 0.1

Whats the error? Please help  
thanks  
vishy

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<div class="post-metadata">

**Author:** ![vishy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/b487fb/32.png) [@vishy](https://www.ruby-forum.com/u/vishy)\
**Post date:** [March 2, 2008, 4:05pm UTC](https://www.ruby-forum.com/t/unable-to-install-sexp-gem/130721/2 "2008-03-02T16:05:44Z")

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> sexp requires multi = 0.1

That means before you can install the sexp gem, you must install the  
multi gem (version 0.1). If you have a recent rubygems installation,  
simply typing “gem install sexp” automatically downloads and installs  
the multi and sexp gems.