Citrix XenApp

Legacy Citrix apps not launching on newer Web Interface servers

If you ever try adding a legacy Citrix Presentation Server 4.0 farm to a Web Interface and the apps don’t launch, check the application event log on your Web Interface servers for Error 31203 messages like below:

Source: Citrix Web Interface
Event ID: 31203
The farm XXXXX has been configured to use launch references, but a
launch reference was not received from the Citrix XML Service.
Check that the farm supports launch references or disable launch
reference requests. [Unique Log ID: XXXXXXX]

Launch references are only support with Presentation Server 4.5 and above. To fix this, go to your WebInterface.conf on your Web Interface servers:

C:\inetpub\wwwroot\Citrix\XenApp\conf\WebInterface.conf

and change RequireLaunchReference and OverrideIcaClientname to Off and On respectively:

RequireLaunchReference=Off
OverrideIcaClientname=On

Update September 4, 2012:
I was informed by our Citrix SE this issue impacts Storefront as well. The work around above will work by changing the same settings in the web.config of the Storefront site.

2 Comments

  1. IronVarmint

    September 13, 2012 at 2:29 PM

    I’m migrating an old Metaframe farm to XenApp 6.5 and have been scratching my head with this question for a few hours now. I thought there might be a setting in the webinterface.conf somewhere. I tried removing socket pooling, but that wasn’t it. Finally I put the right terms into Google and got here. Thank you again Jason for all the information on your site!

  2. Adam S

    August 2, 2014 at 1:57 AM

    Genius mate.
    Thanks heaps.

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