Gems LoadError in Linux

Ruby
1

Hello,

I’m new to Ruby and I wanna run a test a simple Gem in the latest
Ubuntu. I’ve downloaded Ruby 1.9.1 and RubyGems, and the Gem I wanna
test is NFC - which appears installed as a Local Gem after I did $ sudo
gem install nfc…

The problem happens when I try to run my test code:

require ‘nfc’

loop do
NFC.instance.find do |tag|
p tag
end
end

Which errors with:
`require’: no such file to load – nfc (LoadError)

After reading about Gems for a while, I found out that I also need to
add
require ‘rubygems’ to the beginning of the code, but that also gives me
an error:

`require’: no such file to load – rubygems (LoadError)

What am I doing wrong? :confused: Any help will be great.

2

`require’: no such file to load – rubygems (LoadError)

What am I doing wrong? :confused: Any help will be great.

Did you install rubygems into the same ruby that you are using to run
that file?

you could do a
$ gem which nfc

to see if the file is there, too.

You could also try installing the rubygem without sudo so that it is
installed to a different location that gems might like more [?]
-r

3

Roger P. wrote:

Did you install rubygems into the same ruby that you are using to run
that file?

How do I know that? I did:

  1. $ sudo apt-get install ruby1.9.1-full
  2. $ sudo apt-get install rubygems1.9.1

you could do a
$ gem which nfc

to see if the file is there, too.

that instruction resulted in:

(checking gem nfc-2.0.1 for nfc)
/var/lib/gems/1.9.1/gems/nfc-2.0.1/lib/nfc.rb

4

On Thu, Dec 24, 2009 at 01:20:07AM +0900, Augusto E. wrote:

Hello,

I’m new to Ruby and I wanna run a test a simple Gem in the latest
Ubuntu. I’ve downloaded Ruby 1.9.1 and RubyGems, and the Gem I wanna
test is NFC - which appears installed as a Local Gem after I did $ sudo
gem install nfc…

What OS are you running on? Also, can you provide the output of:

ruby -v
gem -v

Also the output of ‘gem list nfc’ might be helpful.

Which errors with:
`require’: no such file to load – nfc (LoadError)

After reading about Gems for a while, I found out that I also need to
add
require ‘rubygems’ to the beginning of the code, but that also gives me
an error:

`require’: no such file to load – rubygems (LoadError)

What am I doing wrong? :confused: Any help will be great.

Not sure. This is strange. You should be requiring rubygems at the
top of your program. But you shouldn’t be getting that error. :slight_smile:

Hopefully the info you provide us with the output of the above commands
will help us track this down!

5

Got it working. I was using Ubuntu and I had version 1.8 installed
already. I was installing the gems in ruby1.8 and using ruby1.9

6

Hi, i know that the post is old, but i’m having the same problem, i am
running Ubuntu 10.04 and installed

ruby1.9.1-full
rubygems1.9.1

when requiring active record for example:

require ‘rubygems’
require ‘active_record’

and run the file i get error:
`require’: no such file to load – active_record (LoadError)

I dont have any other versions of ruby, just 1.9.1, any ideas?

Thanks in advanced

Jaime

On Wednesday, December 23, 2009 11:20 AM Augusto E. wrote:

add
require ‘rubygems’ to the beginning of the code, but that also gives me
an error:

`require’: no such file to load – rubygems (LoadError)

What am I doing wrong? :confused: Any help will be great.

Posted via http://www.ruby-forum.com/.

On Wednesday, December 23, 2009 12:03 PM Aaron P. wrote:

Hopefully the info you provide us with the output of the above commands
will help us track this down!

–
Aaron P.
http://tenderlovemaking.com/

On Wednesday, December 23, 2009 1:35 PM Roger P. wrote:

-r

Posted via http://www.ruby-forum.com/.

On Wednesday, December 23, 2009 9:56 PM Augusto E. wrote:

(checking gem nfc-2.0.1 for nfc)
/var/lib/gems/1.9.1/gems/nfc-2.0.1/lib/nfc.rb

–
Posted via http://www.ruby-forum.com/.

On Thursday, December 24, 2009 7:29 AM Augusto E. wrote:

Got it working. I was using Ubuntu and I had version 1.8 installed
already. I was installing the gems in ruby1.8 and using ruby1.9

Posted via http://www.ruby-forum.com/.

7

perhaps, if you try with export GEM_HOME=“path_gems” ?

2010/8/20 Jaime G. [email protected]

8

Jaime G. wrote:

Hi, i know that the post is old, but i’m having the same problem, i am
running Ubuntu 10.04 and installed

ruby1.9.1-full
rubygems1.9.1

when requiring active record for example:

require ‘rubygems’
require ‘active_record’

Recommend trying 1.9.2 or trying it in irb like
$ ruby --disable-gems -S irb

require ‘rubygems’
require ‘active_record’

9

Roger P. wrote:

Jaime G. wrote:

Hi, i know that the post is old, but i’m having the same problem, i am
running Ubuntu 10.04 and installed

ruby1.9.1-full
rubygems1.9.1

when requiring active record for example:

require ‘rubygems’
require ‘active_record’

Recommend trying 1.9.2 or trying it in irb like
$ ruby --disable-gems -S irb

require ‘rubygems’
require ‘active_record’

Here’s what happens on my Ubuntu 10.04 box. I may be standing on my air
hose
by attempting to have both 1.8.? installed alongside 1.9.1. I would
like to
whack both and go to 1.9.2 but I’m afraid of making things worse instead
of
better.

[~/sinatra_etudes]$ ruby1.9.1 sinatra1.rb
sinatra1.rb:2:in require': no such file to load -- sinatra (LoadError) from sinatra1.rb:2:in’
[~/sinatra_etudes]$ gem1.9.1 which sinatra
/usr/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra.rb
[~/sinatra_etudes]$ uname -a
Linux lucid1 2.6.32-24-generic #42-Ubuntu SMP Fri Aug 20 14:24:04 UTC
2010 i686 GNU/Linux
[~/sinatra_etudes]$ ruby1.9.1 -v
ruby 1.9.1p378 (2010-01-10 revision 26273) [i486-linux]
[~/sinatra_etudes]$ gem1.9.1 -v
1.3.7
[~/sinatra_etudes]$ ruby1.9.1 --disable-gems -S irb
irb(main):001:0> require ‘rubygems’
=> true
irb(main):002:0> require ‘sinatra’
=> true
irb(main):004:0> exit
[~/sinatra_etudes]$ export GEM_HOME=“path_gems”
[~/sinatra_etudes]$ ruby1.9.1 sinatra1.rb
sinatra1.rb:2:in require': no such file to load -- sinatra (LoadError) from sinatra1.rb:2:in’
[~/sinatra_etudes]$ export GEM_HOME="/usr/lib/ruby/gems/1.9.1/gems"
[~/sinatra_etudes]$ ruby1.9.1 sinatra1.rb
sinatra1.rb:2:in require': no such file to load -- sinatra (LoadError) from sinatra1.rb:2:in’

So it works in irb but not from the command line.