• Document ID 31731: Troubleshooting guide for VuGen (not stable/crashes/freezes/GPF)
• Document ID 12532: Troubleshooting guide for Controller ( not stable/crashes/freezes/GPF )

There are a couple of solutions in both documents, but we would recommend trying out the following that usually resolves the problem.

• Login as administrator and perform the work with that account.
• Run the batch file.
• Reinitializing the .ini file or the document term it as “recreate the initialization file”.

Take note on the terminology of the administrator here, it is the default administrator account on the Windows operating system without any changes to it’s roles or privileges. If the environment you worked in have default images, or amended administrator account, you may need to use a machine that is “clean” to test out and run Vugen or Controller. On top of the given list from the official vendor, we’ve experiences that certain situations may cause the Vugen and Controller to behave abnormally as well.

Do you have another Mercury/HP product running on the same machine such as QTP or WinRunner? They may conflict with Vugen and Controller when placed together on the same machine. As such, it is advisable to install only LoadRunner components on the machine while other products are to be installed separately.

In addition, you can use Process Explorer (as recommended by the document) to find out if there are conflict with the processes. The link is broken in the document as Sysinternals have been acquired by Microsoft in July 2006. Click Process Explorer to be directed to the actual website.

Do you have DEP enabled in your machine? DEP (Data Execution Prevention) is part of the Windows XP SP2 feature and extends to Windows 2003 and the Vista versions. For more information of DEP, refer to the following resources:

• A detailed description of the Data Execution Prevention (DEP) feature in Windows XP Service Pack 2, Windows XP Tablet PC Edition 2005, and Windows Server 2003
• Data Execution Prevention by Wikipedia
• Data Execution Prevention by Marc Liron

To resolve this problem, you have to disable DEP. This is as described in Document ID 41489: No events recorded in VuGen when trying to record an application on Windows 2003 SP1 or Windows XP SP2.

What are the technology/protocol used by the application? Specified to Vugen recording, the third possibility that causes the problem is the type of application that you are working with. Example, if the application runs on RCP (Rich Client Platform) or applets but communicates in HTTP. For this, you’ve to identify the actual protocol being transmitted and find workarounds to it. In the example of HTTP, you can refer to a previous article, “Quick-and-Dirty Recording Techniques for Web (HTTP/HTML)” for more information.

If all else fails, the best suggestion is to get a “clean” machine, login with the default local administrator and perform a re-installation of LoadRunner. Remember, the definition of “clean” means that the machine operating system is not based on a clone image. Well, we’ve to say that this is not the entire list that the community is experiencing and therefore, if you have a problem relating to the crashing or abnormal behavior, please share with us and we will append to this list accordingly.