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Error message when trying to run the command: bundle install --without production

When I try to run the

bundle install --without production

command on Ubuntu 12.04, I get an error message like this:

Could not find gem 'pg0.12.2 (>= 0) ruby' in the gems available on this machine

Any ideas about why this is happening? Thanks

If you want 0.12.2 gem to be installed please write in the following way.

gem 'pg', '0.12.2'

If you want version which is greater than 0.12.2 then write in following way

gem 'pg' , '>= 0.12.2'

Please use this link to know more about how to bundle gems in rails Bundle

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