This is a legacy documentation space! Please visit the License Server 5.0 documentation for an up-to-date information. 

This FAQ addresses common issues with licensing.

Page Contents


License Issues

 How to solve "No access to license server" error
  1. Restart the machine with the V-Ray license server and dongle installed.
  2. Unplug the dongle and plug it into a different USB port, preferably a USB 2.0 port. Make sure that Windows properly recognizes the dongle and doesn't show an error message. If you receive an error message, please see  The V-Ray license server can't find the dongle under Dongle Issues
  3. Start the V-Ray license server from Windows Start menu > All Programs > Chaos Group > V-Ray License Server for x64 > Launch V-Ray license server. You might receive a message warning that the V-Ray license server is already running.
  4. Open the link http://localhost:30304 in a web browser on the same machine. This will open the V-Ray license server status web page. If it looks like the screenshot below, the license server is working.


If the status page does not look like the screenshot above, then there is a network problem that prevents the connection to the V-Ray license server. If you have any firewall or antivirus software running on your machines, make sure they are not blocking the application's access to the network or blocking the communication on TCP/IP port 30304. Please contact your system administrator for more information.

 How to solve "No license available" error

After you have addressed the issue of "no license server", you can perform the following steps to check on available licenses.

  1. On the same machine where the V-Ray license server is running, open the link http://localhost:30304/getstatus.
  2. Next, you will need to look for your licenses. Please see the V-Ray Dongle Licensing page for more information on the type of licenses you need to look for.
  3. If you do not see your V-Ray licenses, this means that your dongle has to be reprogrammed as described in the Dongle Reprogramming page.
  4. If you don't see any free licenses, this means that all available licenses are in use and you can't have more concurrent users.

You can also check the V-Ray license settings:


You might need to reconfigure the license settings on the machine where you want to use V-Ray. See the Changing your License Settings page for more information.





Note: If the V-Ray license server is running on the same machine as V-Ray, you can use localhost or in the License server field.

 The V-Ray license server icon isn't appearing in the Windows System Tray.

The icon is hidden by the Auto-hide unused icons option of the Windows System Tray or the V-Ray license server is registered as a Windows service.

If you have the Auto-hide unused icons option of the Windows System Tray, click on the double-arrow icon to expand the full list of icons.

If you still do not see the V-Ray licensing service icon, that means that the V-Ray licensing service is started as a Windows service and in that case it cannot show any graphical user interface. There is currently no resolution for this; you need to manage the V-Ray license service from the Windows Control Panel > Administrative tools > Services applet.


Dongle Issues

 The V-Ray license server can't find the dongle.

This error message appears when the V-Ray license server cannot find a dongle attached to the machine.



  1. Make sure the dongle is not plugged in.
  2. Uninstall the WIBU-KEY driver from the Windows Control Panel.
  3. Update your USB drivers to the latest version.
  4. Restart your machine.
  5. Download and install the latest WIBU-KEY drivers from
  6. Attach the dongle to a different USB port, preferably to USB 2.0. Make sure that Windows recognizes the dongle and doesn't show error messages.
  7. To verify that dongle is properly installed, go to the Windows Control Panel > System applet. Choose the Hardware tab and then click on the Device manager button. Expand the Universal serial bus controllers list and check for a WIBU-BOX/RU entry there:



If you do not find this entry, try plugging the dongle into a different USB port.

 Windows gives an error message when I plug in the dongle or run the license server.

If you get one of the following errors when you plug in the dongle or try to run the V-Ray license server, the problem is with a Windows update.




These errors are caused by the recently added Microsoft Update KB3004394 (added in December 2014 for Windows Root Certificate Program). Affected operating systems are Windows 7 and higher. This update breaks the WIBU-KEY driver.
To fix this problem, you can run Windows Update and update your operating system to the latest version.

Alternatively you can install the Microsoft fix for this issue, available from this page. You will need to download the appropriate package for your particular OS and install it.

After you complete the steps given by Microsoft, follow the instructions below in order to repair your WIBU-KEY driver:

1. Unplug all WIBU-KEY dongles from the PC.

2. Go to Start > Control Panel > Programs and Features and uninstall the WIBU-KEY drivers by double-clicking on WibuKey Setup (WibuKey Remove).





3. Follow the instructions given by the Uninstaller.

4. Open a Windows Explorer window, and in the address bar enter %systemroot%\inf.





5. Find the file wibukeyPCMCIA.inf and delete it.

6. Search for a file named oem*.inf that contains the term WIBU. To do this, enter WIBU in the search bar, and when the search is complete click the File Contents button:




7. The search might take a while, but in the end it should find a file named oem*.inf. Delete that file and the file that has the same name with the extension .pnf. For example, if you found a file named oem123.inf, delete that file and also delete oem123.pnf.

8. In Windows Explorer, in the address bar enter %systemroot%\system32\drivers.





9. Find and delete all WibuKey*.sys files.

10. Click Windows > Start and in the search field type regedit. Run the regedit program found.





11. This will open the Registry Editor. Find and delete the following keys:

In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services if any of the following folders exist, delete them:




In HKEY_LOCAL_MACHINE\SOFTWARE\ find and delete the folder WIBU-SYSTEMS.

12. Restart the computer.

13. After reboot, download the latest driver form the official WIBU Systems site under the WibuKey for Users section. Do not install it before following the next instructions.

14. Ensure that you have administrative rights, and make sure the dongle is NOT plugged in.

15. Now, double-click on the installation file and follow the instructions.

16. After the installation has finished, plug in the dongle. The New hardware found window will appear and install the new hardware automatically.

 When I install or uninstall the WIBU-KEY driver, I get an error.

If you see one of the following errors when installing or uninstalling the driver, the error is caused by a Microsoft update. See  Windows gives an error message when I plug in the dongle or run the license server  for the solution.



 WIBU-KEY drivers are properly installed, but double-clicking on the .rtu file doesn't update the dongle.

This happens because the .rtu file is not associated properly with the WIBU-KEY drivers.

First, try the steps from The V-Ray license server can't find the dongle.  If that doesn't help, proceed with the steps below:

1 . Make sure that the dongle is plugged in.

2. In the Windows Control Panel locate the WibuKey management tool and run it. You will need to start it in Advanced Mode from the system menu by clicking on the system icon in title bar (shown in red in the screenshot below).

3. Go to the WibuBox Update tab.



4. Click Browse, specify the .rtu file, and click Apply.



 The dongle works for extended periods, but once in a while it seems to disconnect.

You might find that the dongle works perfectly for extended periods of time, but that it periodically "disappears" and is no longer detected by Windows as a USB device. This could cause the V-Ray license server to fail or V-Ray licenses to be refused. There can be a number of reasons related to the hardware configuration and Windows settings, such as power options.

Check your Windows power options to see what happens when the machine is idle, and make sure your USB devices are not powered off.

Try plugging the dongle into a different USB port on the same machine, preferably USB 2.0, and restart the V-Ray license server.

If you still experience problems, try installing the dongle on a different machine.