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Learn how to resolve the error `cannot load such file -- gems/bundler-2.1.4/exe/bundle` when running `bundle install` in your Ruby on Rails project by installing a compatible version of Bundler.
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Resolving the Error cannot load such file -- gems/bundler-2.1.4/exe/bundle in Ruby on Rails

If you're a Ruby on Rails developer, you may occasionally encounter errors while managing your gems and dependencies. One such troubling error that can pop up during the bundle install command is:

[[See Video to Reveal this Text or Code Snippet]]

This error typically suggests that there is a conflict between the version of Bundler you have installed and the version that your application requires. In this guide, we will break down the issue and guide you through the steps to resolve it.

Understanding the Problem

The error indicates that you are attempting to use Bundler 2.1.4, but your project (specifically, Rails 4.2.11.1) is not compatible with this version. Rails 4.2 specifically requires a version of Bundler that is lower than 2.0. Here’s a brief overview of your scenario:

Current Bundler version: 2.1.4

Rails version: 4.2.11.1

Bundler requirement for Rails 4.2: bundler (>= 1.3.0, < 2.0)

Your system is unable to load the proper file because the Bundler version you've installed does not meet the requirements specified in your Gemfile. Don't worry; this is a common issue, and with a few adjustments, you can get back on track.

How to Fix the Issue

To resolve this error, you'll need to install a compatible version of Bundler, specifically 1.17.3. Below are the step-by-step instructions to do so:

Step 1: Install a Supported Bundler Version

Open your terminal.

Run the following command to install Bundler 1.17.3:

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This command instructs RubyGems to get you the specific version of Bundler that your Rails project can work with.

Step 2: Use the Newly Installed Version of Bundler

After you’ve successfully installed the compatible Bundler version, the next step is to ensure that you invoke this version when running your commands. To use Bundler 1.17.3, run:

[[See Video to Reveal this Text or Code Snippet]]

Using the underscore (_) syntax here ensures that you're calling the specific version of Bundler you've just installed, which helps avoid any confusion with the newer version.

Conclusion

By following the above steps, you should now successfully resolve the cannot load such file -- gems/bundler-2.1.4/exe/bundle error. It's important to keep your dependencies compatible to avoid such conflicts in the future. Working with the correct versions helps maintain a smooth development workflow.

Remember to frequently check your Gemfile for any duplicates or inconsistencies, as addressing such issues proactively can save you headaches down the line. Happy coding!