Citrix Receiver 4 and Presentation Server 4

Citrix Receiver 4 and Presentation Server 4

During Citrix Migration Projects you often face the Problem that you want to Connect With New Citrix Client Versions ( Receiver 4 ) to old Citrix Farms for Example Metaframe Presentation Server 4.0 and 4.5.

Doing this you will face 2 Problems:

1. If you want to start an Application with a Citrix Receiver 4.0 on a Webinterface 5.4 you get a Error Message: LauncherReference Missing.

To solf this Problem you have to modify the “webinterface.conf”. Set the Attribut “RequireLaunchReference” from “on” to “off” and you will be able to start Your Application.

2. You will face high Performance Errors.

To resolve this you need to modify the Regirty of the connecting Client Computer:

For x86 Computers:

Registry Key: HKEY_LOCAL_MACHINE > SOFTWARE > Citrix > ICA Client > Engine > Lockdown Profiles > All Regions > Lockdown > Virtual Channels > Seamless Windows

Value Name: DeferredUpdateMode
Value Type: REG_SZ
Value: false (instead of default “*”)

For x64 Computers:

Registry Key: HKEY_LOCAL_MACHINE > SOFTWARE > Wow6432Node > Citrix > ICA Client > Engine > Lockdown Profiles > All Regions > Lockdown > Virtual Channels > Seamless Windows
Value Name: DeferredUpdateMode
Value Type: REG_SZ
Value: false (instead of default “*”)

After doing this Your Performance Errors should be solved.

Michael Høegh Vilain, VP, leading the Hosting business for Crayon Group Worldwide. Worked in the IT industry all of my professional career +27 years. I have worked for IBM (10) , Microsoft(15) and now Crayon (2) . I have worked with ISV, SI, Distributors, End Customers and now with Service Providers. Primary roles always within Sales and Marketing.

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