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RubyGems: undefined method ‘manage_gems’ for Gem:Module (NoMethodError)

After updating RubyGems I got the following error message:

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/usr/bin/gem:10: undefined method `manage_gems' for Gem:Module (NoMethodError)
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Nice. So I took a look at the output that was generated and came across this:

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Deprecation Notices:

* Gem::manage_gems has been removed.
* Time::today will be removed in RubyGems 1.4.

Now what? Right – fix it.

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sudo vim /usr/bin/gem

Search “Gem.manage_gems” and remove it or replace it with

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#Gem.manage_gems

Unfortunately i got this

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/usr/bin/gem:23: uninitialized constant Gem::GemRunner (NameError)
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when running the gems command. After “googling” I came up with this:  

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sudo vim /usr/bin/gem

inserting

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require 'rubygems/gem_runner'

so that the first lines of /usr/bin/gem look like this 

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require 'rubygems'
require 'rubygems/gem_runner'
#Gem.manage_gems

Fixed.

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This entry was posted on Thursday, April 30th, 2009 at 06:59 and is filed under Development. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

48 Responses to “RubyGems: undefined method ‘manage_gems’ for Gem:Module (NoMethodError)”

  1. Laurent Farcy says:
    06/05/2009 at 18:27

    Thx. It solved my problem.

  2. Juan Carlos says:
    08/05/2009 at 13:57

    Thanks!! It works for me too!

  3. pililo says:
    11/05/2009 at 05:15

    Thanks

    =)

  4. Rexar says:
    13/05/2009 at 20:47

    Thanks a lot man !

  5. David says:
    18/05/2009 at 15:11

    Thanks 2!!!

  6. feby says:
    18/05/2009 at 19:05

    You’re my hero :-)

  7. Doug says:
    29/05/2009 at 17:11

    Thanks a ton.

  8. Jessie says:
    02/06/2009 at 10:19

    Great !
    Problem solved on Ubuntu / ruby 1.86
    Thanks !

  9. Pablo says:
    04/06/2009 at 06:04

    Just what I was looking for!! Thank you very much.

  10. psynaptic says:
    08/06/2009 at 03:08

    Nice one, fixed my issue and allowed me to install a specific version of rails. Thank you!

  11. Mark says:
    11/06/2009 at 00:47

    Worked here too. Dumb bugs! hahah

  12. Bill says:
    17/06/2009 at 01:51

    That did the trick on Xubuntu 8.04. Thanks for the gem.

  13. akimo says:
    17/06/2009 at 12:11

    thank you for this fix. that saved my day!

  14. Wouter says:
    18/06/2009 at 23:06

    Tnx!

  15. Raviraj says:
    25/06/2009 at 12:38

    Thank a lots

  16. Aashish says:
    07/07/2009 at 09:55

    Thanks a bunch!

  17. Vellingiri says:
    09/07/2009 at 06:23

    I really thanks for your effort on this. I also faced this problem. I went through your modification wherever is needed. It works fine for me. Thanks man.

  18. angel says:
    09/07/2009 at 16:31

    Thanks a lot!

    Respect!

  19. Terry says:
    17/07/2009 at 21:53

    Thanks! It worked for me too. Good on ya for sharing.

  20. Ignacio says:
    21/07/2009 at 09:26

    Thanks man! You rock

  21. Noboru says:
    27/07/2009 at 09:40

    Thank’s that helped

  22. Adam DiCarlo says:
    28/07/2009 at 09:42

    Hmm, couldn’t you just replace /usr/bin/gem with /usr/bin/gem1.8? That’s what got installed by update_rubygems.

    To fix it I just did:
    sudo mv /usr/bin/gem1.8 /usr/bin/gem

  23. lfat says:
    07/08/2009 at 13:37

    thanks so much!!!

  24. Shane says:
    07/08/2009 at 14:10

    Thanks for the info!

  25. Ansuman says:
    13/08/2009 at 11:52

    very logical..: )

  26. sergej says:
    18/08/2009 at 16:09

    Thx!

  27. Sim says:
    21/08/2009 at 00:43

    Thanks a bunch!!

  28. phil says:
    21/08/2009 at 20:17

    thx saved my day!

  29. parth says:
    31/08/2009 at 04:33

    Thanks a lot for posting the solution to this issue!

  30. Edi says:
    21/09/2009 at 15:31

    Thanks!

  31. chemaff says:
    20/10/2009 at 11:52

    Thanks!! :-)

  32. Charles says:
    23/10/2009 at 20:06

    Yay, thanks.

  33. umpirsky says:
    28/10/2009 at 09:44

    Man, this is awesome. i saw this post previously, but blog theme is vired and I didn’t saw explanation text at all :)

  34. Mr Anderson says:
    03/11/2009 at 00:59

    Thanks, that’s what I was looking for. ;)

  35. Raul says:
    06/11/2009 at 16:17

    Thanks ,very good to do

  36. Miguel says:
    16/11/2009 at 03:20

    Thanks! it worked for me and I’m a total noob…

  37. Java says:
    20/11/2009 at 03:00

    Didn’t. Ruby sucks.

  38. Jaroslav says:
    28/11/2009 at 08:37

    Thanks! Muchas gracias!

  39. Bless says:
    08/12/2009 at 07:36

    Thanks. But how do you know this is the one that need to be written?

  40. Greg says:
    25/12/2009 at 01:29

    Very nice.

  41. John says:
    08/01/2010 at 21:56

    Thanks! Your still saving people with this tip! Found this on 3 Ubuntu 8.04 boxes today, couldn’t figure out what to do until I found your fix.

  42. Dewd says:
    09/01/2010 at 07:05

    You r da walrus! I wasted an evening,.. and then found yr post. Now all is sunshine and champagne! Guys like you need a medal (or a holiday in the Pacific with a bevy of babes!). Cheers, Man!

  43. Jonathan says:
    12/01/2010 at 12:18

    Thanks. This happened to me today seven months after your post. Which makes me wonder, how come the code has not been fixed.

    A number of curious people might have been put off Ruby during their very first encounter.

    Thanks again, this kind of issue drives me mad. If only it just worked.

  44. UmitOz says:
    19/01/2010 at 18:05

    This helped me to solve my problem while upgrading from rails 1.2.3 to 1.2.6. Thanks.

  45. Irregular Shed says:
    25/01/2010 at 19:52

    Thanks for that. It’s done the trick – I need things to Just Work to get by my boss and was beginning to get very annoyed at Ruby today!

  46. Marcel says:
    22/02/2010 at 23:54

    On ubuntu hardy, I found this happened after doing “gem update –system”, which seemed to update /usr/bin/gem1.8 but not /usr/bin/gem. So I fixed this way instead:

    rm /usr/bin/gem
    ln -s /usr/bin/gem1.8 /usr/bin/gem

  47. Jonathan says:
    24/02/2010 at 00:58

    Brilliant! Thank you!

  48. Krzsyztof Niemkiewicz says:
    24/02/2010 at 16:19

    Thanks !! Great post.

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