# Strange error msg when i run "ruby script/server "in my new

**URL:** <https://www.ruby-forum.com/t/strange-error-msg-when-i-run-ruby-script-server-in-my-new/82862>\
**Category:** Ruby\
**Created:** [January 22, 2007, 12:26am UTC](https://www.ruby-forum.com/t/strange-error-msg-when-i-run-ruby-script-server-in-my-new/82862 "2007-01-22T00:26:25Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![libsfan01](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/779978/32.png) [@libsfan01](https://www.ruby-forum.com/u/libsfan01)\
**Post date:** [January 22, 2007, 12:26am UTC](https://www.ruby-forum.com/t/strange-error-msg-when-i-run-ruby-script-server-in-my-new/82862/1 "2007-01-22T00:26:25Z")

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i just installed ruby and rails but i get this error msg when i run  
“ruby script/server” in my new site:

Cannot find gem for Rails ~\>1.2.1.0:  
Install the missing gem with ‘gem install -v=1.2.1 rails’, or  
change environment.rb to define RAILS\_GEM\_VERSION with your desired  
version.