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OCLC Support

How to completely uninstall and reinstall Connexion client 3.x

Applies to
  •  Connexion client 3.x


If you're experiencing file access issues with Connexion client 3.x, even after uninstalling and reinstalling, it's possible that not all components were completely uninstalled prior to the reinstallation.

Connexion client installs three components:

  • OCLC Connexion client (main application)
  • OCLC Connexion ComService (responsible for macro functionality)
  • Microsoft Access database engine 2010 (English) (responsible for local file access)

Follow the steps below for a comprehensive uninstallation and reinstallation process.

Note: during any client uninstall procedure, whether it be a standard uninstall, or this enhanced method, your data and settings located at %AppData%\OCLC are not removed. This allows for client uninstall/reinstall, or client upgrade without losing settings. If you would like to remove this data as well, you'll need to delete it manually by navigating to your %AppData% folder and deleting the OCLC folder.

These steps are applicable exclusively to Connexion client 3.x.

Uninstallation and Reinstallation Steps

  1. Open the "Programs & Features" section on your computer.
  2. Uninstall "OCLC Connexion client 3.x."
  3. To ensure the complete removal of components from memory, reboot your computer and return to Programs & Features.
  4. If present, uninstall the "OCLC Connexion ComService."
  5. If "Microsoft Access database engine 2010 (English)" is present, uninstall only that specific version. If there are other versions listed, do not uninstall them.
  6. See the Note in the section above, and decide if you want to delete the data at %AppData%\OCLC as well.

Once you've removed all components, proceed with the reinstallation of the client. This process will ensure that all three components are reinstalled.
Open the client and try accessing your local files.

Additional information

If the error persists even after following the above steps, please contact OCLC Support. Provide screenshots of the error to assist with troubleshooting.

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