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# Troubleshooting common issues
Stuck using Bundler? Browse these common issues before [filing a new issue](contributing/ISSUES.md).
## Permission denied when installing bundler
Certain operating systems such as MacOS and Ubuntu have versions of Ruby that require elevated privileges to install gems.
ERROR: While executing gem ... (Gem::FilePermissionError)
You don't have write permissions for the /Library/Ruby/Gems/2.0.0 directory.
There are multiple ways to solve this issue. You can install bundler with elevated privileges using `sudo` or `su`.
sudo gem install bundler
If you cannot elevate your privileges or do not want to globally install Bundler, you can use the `--user-install` option.
gem install bundler --user-install
This will install Bundler into your home directory. Note that you will need to append `~/.gem/ruby/<ruby version>/bin` to your `$PATH` variable to use `bundle`.
## Heroku errors
Please open a ticket with [Heroku](https://www.heroku.com) if you're having trouble deploying. They have a professional support team who can help you resolve Heroku issues far better than the Bundler team can. If the problem that you are having turns out to be a bug in Bundler itself, [Heroku support](https://www.heroku.com/support) can get the exact details to us.
## Other problems
First, figure out exactly what it is that you're trying to do (see [XY Problem](http://xyproblem.info/)). Then, go to the [Bundler documentation website](http://bundler.io) and see if we have instructions on how to do that.
Second, check [the compatibility
list](http://bundler.io/compatibility.html), and make sure that the version of Bundler that you are using works with the versions of Ruby and RubyGems that you are using. To see your versions:
# Bundler version
bundle -v
# Ruby version
ruby -v
# RubyGems version
gem -v
If these instructions don't work, or you can't find any appropriate instructions, you can try these troubleshooting steps:
# Update to the latest version of bundler
`gem install bundler`
# Remove user-specific gems and git repos
rm -rf ~/.bundle/ ~/.gem/bundler/ ~/.gems/cache/bundler/
# Remove system-wide git repos and git checkouts
rm -rf $GEM_HOME/bundler/ $GEM_HOME/cache/bundler/
# Remove project-specific settings
rm -rf .bundle/
# Remove project-specific cached gems and repos
rm -rf vendor/cache/
# Remove the saved resolve of the Gemfile
rm -rf Gemfile.lock
# Uninstall the rubygems-bundler and open_gem gems
rvm gemset use global # if using rvm
gem uninstall rubygems-bundler open_gem
# Try to install one more time
bundle install
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