# \[Rails\] RubyGem version error: rack(1.0.0 not ~\> 1.0.1)

**URL:** <https://www.ruby-forum.com/t/rails-rubygem-version-error-rack-1-0-0-not-1-0-1/183834>\
**Category:** IT\
**Created:** [February 21, 2010, 12:09pm UTC](https://www.ruby-forum.com/t/rails-rubygem-version-error-rack-1-0-0-not-1-0-1/183834 "2010-02-21T12:09:07Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![sgurbat](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/9de0a6/32.png) [@sgurbat](https://www.ruby-forum.com/u/sgurbat)\
**Post date:** [February 21, 2010, 12:09pm UTC](https://www.ruby-forum.com/t/rails-rubygem-version-error-rack-1-0-0-not-1-0-1/183834/1 "2010-02-21T12:09:07Z")

</div>

Sto cercando di usare Rails 2.3.5 su Ubuntu con JRuby e GlassFish come  
Server ma cercando di far partire il mio progetto ottengo questo errore:

```auto
 RubyGem version error: rack(1.0.0 not ~> 1.0.1)
```

Premetto che rack era già installata come gemma nella versione 1.0.1  
eppure.

Ora ho fatto un update e mi risultano due gemme.

```auto
rack (1.1.0, 1.0.1)
```

Ma il problema non sembra risolto.

Suggerimenti?

Grazie.