Citrix XenCenter crashes with error 0xc000007b

Written by Ingmar Verheij on July 23rd, 2012. Posted in XenServer

After launching Citrix XenCenter if crashed with error 0xc00007b and exited immediately. Although my work laptop is really in need of some TLC – it needs a clean install, I preferred troubleshooting the issue.

A quick trace with Sysinternals Process Monitor showed a dynamic link library (DLL) being loaded that I didn’t expect: Airfoilinject3.dll.

Install Citrix APPDNA with QuickDB on a non-system drive

Written by Ingmar Verheij on July 12th, 2012. Posted in AppDNA

There are two installers available for Citrix AppDNA (former App-DNA Apptitude). Depending on how big of a download you want to obtain and distribute internally, you can choose any of those two. Both installers will result in the same product:

  • AppDNA Enterprise Edition [288MB]
  • AppDNA Enterprise Edition with Quick DB Install [659MB]

The main difference between the two installers is that the ‘with Quick DB install’ includes a database dump of OS images, where you otherwise would have to download and import the OS images manually (which will take around 2 hours).

Howto: Citrix AppDNA installation logfiles

Written by Ingmar Verheij on July 12th, 2012. Posted in AppDNA

If your having problems installing Citrix AppDNA (former App-DNA Apptitude) you’ll might struggle to find installation log files. This is because the logfiles aren’t created by default, you need to enable it by placing a marker file.


The installer checks if the file %Temp%\ActivateAppTitudeVerboseLog.txt exists:

“Citrix Receiver – Security Warning” explained and demystified

Written by Ingmar Verheij on June 26th, 2012. Posted in Citrix, Demystified

Citrix Receiver - Security WarningWhen you’ve worked with a Citrix XenApp or XenDesktop environment you must be familiar with the Security Warning dialog. It prevents a remote machine (your hosted application or desktop) from accessing resources on the client device, a security boundary you want to protect when from unmanaged systems.

But on managed systems you want to prevent this message, you don’t want your users to be confronted with a message you tell them to accept (otherwise it won’t work and they’re to blame).

In this article I’ll explain why this message is displayed and how you can prevent it.

Receiver 11.05 for Windows CE fixes disappearing smartcard in Citrix session (UZI pas)

Written by Ingmar Verheij on June 26th, 2012. Posted in XenApp (Presentation Server)

UZI pas

Last year I wrote an article about a smartcard (UZI pas) that couldn’t be used from a Windows CE 6 thin client in a Citrix XenApp environment. The problem seemed to be solved with a private client and installing Hotfix Rollup Pack 6 on the server.

Months later, when the customer started testing again, we discovered a new issue: The smartcard reader device disappeared from the session!

It took 4 months and 5 Citrix support engineers (Ross, Shane, Romulo, Brian and finally Anthony) before we solved the issue with an updated Citrix Receiver for Windows CE 11.05 (I’ve provided the files below).