Citrix Sessions keeps giving message Unsupported function

Problem

When you start a load test the Citrix Sessions keeps giving a message Unsupported function.

Solution

When the LoadGen Agent will log on to the desktop user it's possible that the Citrix processes are started in a normal context. LoadGen will start the Citrix processes in elevated context, which results in a conflicting state between the different Citrix processes. 

Windows 10

  1. Open the Task Manager.
  2. Go to Startup.
  3. Find all the Citrix processes.
  4. Right mouseclick the Citrix process and press Disable.

Windows Server and Windows 10 multi-user

  1. Open the Registry Editor.
  2. Remove the Citrix items from the following locations:
    1. HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run
    2. HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

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