This section describes troubleshooting and limitations for Citrix Vusers.
The Citrix registry patch is installed when you record or replay a Citrix Vuser script for the first time. In rare situations, the error log will indicate that it could not be installed. In this case, try to install the registry patch manually. The patch can be found at: <LoadRunner installation>\dat\Enable_Citrix_API.reg. To install the registry patch, double-click Enable_Citrix_API.reg on the relevant machine.
Note: The Citrix client is 32-bit software. Therefore, on a 64-bit OS, install this registry patch under HKLM\SOFTWARE\Wow6432Node\ , and not under HKLM\SOFTWARE\ . To do this, launch Enable_Citrix_API.reg from the 32-bit file manager or modify it before launching it from Windows Explorer."
Running Citrix Vusers on virtual machines may adversely affect performance due to the sharing of physical resources.
Text recognition may not work correctly for overlapped windows on Windows 2012 servers.
On Windows 8.1, in replay, the Start menu may not appear after clicking on the Start button. Workaround: Add another ctrx_mouse_click function into the script below the recorded ctrx_mouse_click or ctrx_obj_mouse_click functions.
- The Citrix agent does not provide support for Java applications on x86 operating systems.
If an ICA script succeeds in VuGen, but fails when running on a Load Generator, check the display on the Load Generator machine. If it displays a Citrix dialog box titled, ICA Client File Security, then in the Access section of the dialog box, select Full Accessand then select Never ask me again for any application and click OK to apply your changes.
Note: You can also set these options in WebICA.ini. For details, see http://support.citrix.com/article/CTX568194
- The Citrix agent cannot capture text from Java-based applications or from Internet Explorer version 9 and later.
The Citrix agent cannot capture text from certain Java controls with overlapping text boxes, such as drop down and combo boxes.
The recording window size option does not work properly with the Plugin for Hosted Applications 11. The size of the client window is captured, but the server screen resolution is not. This is a Citrix Client limitation and may be fixed in future Citrix Client versions.
Workaround: When recording, set the window size equal to the local screen resolution. When replaying/load testing, set the VuGen or Load Generator screen resolution to equal the resolution used when the script was recorded. To verify the recorded resolution, view the Window property in the <Script Folder>\default.cfg file.
The Citrix Connection Center may prevent record and replay of Citrix ICA scripts, if it is running in a different user session on the same machine.
Workaround: Close all instances of the concenter.exe process for all users. To prevent the Citrix Connection Center from starting automatically, set the ConnectionCenter registry key to an empty value. This key can be found at:
For 32-bit systems:
For 64-bit systems:
Recording a Citrix Web Interface script on Internet Explorer 9 is supported only from Citrix client version 220.127.116.11 or later.
When you run Citrix Vusers with the agent installed, each Vuser runs its own process of ctrxagent.exe. This results in a slight reduction in the number of Vusers that can run on the server machine (about 7%).
When the agent is installed, the memory requirements per Citrix Vuser is approximately 4.35 MB. To run 25 Vusers, you would need 110 MBs of memory.
Communication between Citrix Server and Citrix client-side software is directed via Citrix ICA Virtual Channels. This is a bi-directional connection for the exchange of packet data.
Each Vuser opens its own instance of HP Citrix Agent on the server side, and, respectively, its own virtual channel. Citrix Virtual Channels may become unreliable under high load. As a consequence, functions that rely on Citrix Agent API (ctrx_get_text(), ctrx_sync_on_obj_info() etc.) may fail randomly.
Workaround: Use a TCP channel for communication with the Citrix Agent. Set the following flags:
TCPChannel=1 in the
[CITIRX] section of the script’s default.cfg configuration file,
TcpChannelEnabled=1 in the
[ChannelConfig] section of the CtrxAgent.ini file.
Note that for MinPortValue and NumPorts flags in CtrxAgent.ini, the agent tries to find a free port and enumerates NumPorts ports starting from MinPortValue. If you have firewall software on the Citrix server or load generator, make sure to configure it to allow connections on these ports.
If the Citrix Agent does not start, check that corresponding keys are present in the registry.
In order to be launched during session initialization, Citrix Agent’s installer writes it to registry. For servers, it adds it under HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon, and for client machines under HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run.
Also, make sure the Citrix agent's installation folder, usually C:\Program Files (x86)\HP\Agent for Citrix Server, is set to "Read and Execute" and not only “Read”.
If you experience an unexpected disconnection, it may be a result of connecting to a session that already exists on the server. When a Vuser enters an existing session, it cannot receive Windows events from a Citrix ICA object. This is a limitation of the Citrix software.
Workaround: To prevent this, ask the Citrix administrator to configure sessions on the Citrix server to be terminated immediately after disconnect or log off. In the VuGen script side, make sure to add a ctrx_logoff() function at the end of the script (in the vuser_end section).
The Citrix client may prompt you with a warning "An online application is attempting to access files in your computer". This dialog box blocks the replay because it requires user intervention.
Workaround: To prevent this, configure the registry on the Citrix client machine to allow it to silently access local drives, as described in http://support.citrix.com/article/CTX124921.
This error occurs when the Citrix registry patch (LR\dat\Enable_Citrix_API.reg) is not installed
Workaround:Make sure the AllowSimulationAPI key is present in the above registry and not set to 0, as it enables Citrix ICO functionality. Note that in 64-bit operating systems, these keys should reside under the HKLM\Software\Wow6432Node, node, since the Citrix client is a 32-bit application.
The Citrix Error 13 is a general error code that usually refers to an error for which Citrix do not provide a specific code. This error is most common in Performance Center and BPM environments where Citrix processes (wfica32.exe, wfcrun32.exe, concentr.exe, receiver.exe…) are running in sessions other than that of the mdrv process.
Workaround: Use TaskManager or ProcessExplorer to find and kill all of these processes.
This error may occur for several reasons: network issues, proxy configuration, and so forth. Often, it occurs when you are running a Citrix+Web multi-protocol script recorded against a secured (https) Web Interface site, and the certificate required by this site is missing on the Load Generator machine.
Workaround: Try to open the published application from the Web Interface on the problematic machine. Look at the log file %APPDATA%\ICAClient\wfcwin32.log and search for “SSL Error 61”. If you find this text, it is clearly a certificate issue. For example,
09-18-2014 10:28:55:380 Calculator MUCFARMEXT01: SSL Error 61: You have not chosen to trust "AddTrust External CA Root", the issuer of the server's security certificate.
Compare certificates on the Load Generator and VuGen machines and install the missing one. Make sure that the attributes match—do not rely on a matching certificate name only. You must also check also other attributes such as “Expiration date”.
In certain Windows 7 installations, VuGen is unable to capture the actual text during recording. Instead it captures empty text.
Open Start > Control Panel > System and Security > System > Advanced system settings. The System Properties dialog box opens.
Select the Advanced tab and click the Settings button in the Performance section.
In the Performance Options dialog box, click the Visual Effects tab.
Clear the check box adjacent to the last option, Use visual styles on windows and buttons.