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Citrix WebInterface 5.3 on IIS7

While configuring a Citrix NetScaler 9.2 in conjunction with WebInterface 5.3 I received the following error message when executing a published application.

An error occurred while trying to access the requested resource.

I thought to myself….no problemo, since I blogged about this problem before (source). This solution didn’t help. After changing the RequireLaunchReference value I still receive the error while opening an application. The only difference is that the event viewer message isn’t generated anymore.

After searching the internet I found another Citrix knowledge base article, called “Application Launch Failure in Web Interface 5.0 through 5.3”. This article provided me with the solution.

It looks like IIS 7 differs quite a lot from earlier versions. Citrix’s background on the problem:

It is currently suggested not to run .NET 1.1 or .NET 4.0 on a windows 2008 Web Interface server that is using Web interface 5.0 through 5.3. The .Net Framework 2.0 common language runtimes will be used in conjunction with the 3.0 and 3.5.

Don’t ask me what it is, because I don’t know. Switches, routers, firewall and other networking components don’t use Microsoft .NET…..

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René Jorissen

Co-owner and Solution Specialist at 4IP Solutions
René Jorissen works as Solution Specialist for 4IP in the Netherlands. Network Infrastructures are the primary focus. René works with equipment of multiple vendors, like Cisco, Aruba Networks, FortiNet, HP Networking, Juniper Networks, RSA SecurID, AeroHive, Microsoft and many more. René is Aruba Mobility First Expert (AMFX #26), Aruba Certified Mobility Expert (ACMX #438), Aruba Certified ClearPass Expert (ACCX #725), Aruba Certified Design Expert (ACDX #760), CCNP R&S, FCNSP and Certified Ethical Hacker (CEF) certified. You can follow René on Twitter and LinkedIn.

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One Response to Citrix WebInterface 5.3 on IIS7

  • Thanks dude for posting these pointers – i ran through both and could not resolve.
    Seems like it was an issue with XML service trust as decribed here
    http://support.citrix.com/article/CTX127393
    the clue was in the error message “Some of your resources have not been reconnected. If this message does not usually appear during your sessions, contact your system administrator.”
    Once XML trust was established (no restart needed) , all was ok.
    thanks for your pointers!

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