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Citrix® XenApp® 6.5 Expert Cookbook by Esther Barthel MSc

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Troubleshooting the Protocol Driver error message

This recipe will show you how to troubleshoot the Protocol Driver Error messages that users may receive when they are unable to launch a published application from XenApp 6.5.

How to do it...

The Protocol Driver error message can have more than one cause, so let's run a step-by-step analysis of the entire route from client to server to find the specific reason.

  1. Ensure the latest ICA client is installed on the client device, including the Online Plug-in.
    1. Find the Citrix Receiver icon in the system tray on the Windows client.
    2. Right-click on the icon and select About.
    3. Click on Support Info to see the Receiver version, installed plug-ins, and Online Plug-in version:
  2. Ensure the Citrix Web Interface site is ...

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