# ERROR: While executing gem ... (Gem::GemNotFoundException) C

**URL:** <https://www.ruby-forum.com/t/error-while-executing-gem-gem-gemnotfoundexception-c/134596>\
**Category:** Ruby\
**Created:** [April 12, 2008, 5:50pm UTC](https://www.ruby-forum.com/t/error-while-executing-gem-gem-gemnotfoundexception-c/134596 "2008-04-12T17:50:15Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![lostwarrior](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/a88e57/32.png) [@lostwarrior](https://www.ruby-forum.com/u/lostwarrior)\
**Post date:** [April 12, 2008, 5:50pm UTC](https://www.ruby-forum.com/t/error-while-executing-gem-gem-gemnotfoundexception-c/134596/1 "2008-04-12T17:50:15Z")

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hi every one i am facing this problem .please tell how to solve it.if i  
am instaling rails its showing rails installed.bu if i tried rails  
test.Its giving rails command not found