This could cause the V-Ray license server to fail or V-Ray licenses to be refused. The dongle is working for extended periods of time but periodically disappears for no apparent reason and is no longer detected by Windows as a USB device. Make sure that Windows recognizes the dongle and doesn't show error messages. This error message appears when the V-Ray license server cannot find a dongle attached to the machine. If you modify any of these settings, you will need to restart Maya. Please contact your system administrator for more information. In the example screenshot below the IP address of the machine with the license server is If you get an error message that the web page can't be accessed then there is a network problem that prevents the connection to the V-Ray license server. If you get a web page like the one below, V-Ray can access the V-Ray license server from this machine. If you don't see free licenses this means that all available licenses are in use and you can't have more concurrent users. For dongles: If you do not see the V-Ray 3. You can see all available render nodes and interface licenses, as well as check the borrowed ones. You have to have proper licenses for the installed V-Ray version, e. Checking the available licenses on the license server: Check the available licenses. If it looks like the screenshot below, the license server is working. Make sure that Windows properly recognizes the dongle and doesn't show an error message. When you start the IPR render server, there are no error messages in the V-Ray console, but when a job is sent to the IPR render server there is an error in the console 'Could not obtain a license When you start the IPR render server, there are no error messages in the V-Ray console, but when a job is sent to the IPR render server, the error in the console is 'Could not obtain a license Please restart the machine with the V-Ray license server or dongle installed. V-Ray connected to a working license server but there are no available licenses for the installed V-Ray version. When attempting to render, the Maya status line shows the message 'error: Could not obtain a license '. When attempting to render, the Maya status line shows the message 'error: Could not obtain a license ' or 'error: Could not obtain a license ' or 'error: Could not obtain a license 61 '. Please check the resolution part at the end of this section. Here you can find the list of symptoms and their likely cause when V-Ray could not obtain the license. For creating dump files, please see the Creating Minidump Files page.

Maya vray could not obtain license