An error occurred while making the requested connection

      An error occurred while making the requested connection when Launching Applications from a Legacy Citrix Farm through Web Interface 5.x

When administrators try to integrate legacy Citrix farm with XenApp6 or 6.5 farm in the same web interface and launch application they will get the below attached error.

Cause: Web Interface 5.x (5.2, 5.3, 5.4) by default, are not compatible with Citrix metaframe xp, Presentation server 3.0 & 4.0 Server for Windows or UNIX. An additional manual site configuration step is required.

Resolution:

·         On the Web Interface 5.x server, locate the WebInterface.conf file (\Inetpub\wwwroot\Citrix\XenApp\Conf) and open it with a text editor.

·         Locate the following entry around “RequireLaunchReference=On”

·         Replace it with the following entry: “RequireLaunchReference=Off”

·         Save the WebInterface.conf file and test.

·         Users should be able to launch applications from the Legacy Citrix farm successfully.