This answer record details the known issues related to the Xilinx implementation of FLEXnet licensing for the 2018.x Vivado releases.
For license troubleshooting help, see (Xilinx Answer 32301).
For the Licensing Solution Center, see (Xilinx Answer 41259).
For general questions about software licensing, see the following Xilinx Licensing FAQ page.
Xilinx Licensing Site:
Outstanding Known Issues in Vivado 2018.3
There are no outstanding licensing issues at present time
Known Issues resolved in Vivado 2018.3
Outstanding Known Issues in Vivado 2018.2
|(Xilinx Answer 60164)||Vivado License Manager (VLM) takes a long time to load the available licenses|
|(Xilinx Answer 69377)||Floating License Server Checkout Error When Using Vivado 2017.3|
|(Xilinx Answer 69969)||After upgrading our server to Flexlm utilities v11.14, vendor Daemon will not start anymore if 2015 Microsoft redistributables are not installed|
Known Issues resolved in Vivado 2018.2
Please seek technical support via the Install and Licensing Forum Board. The Xilinx Forums are a great resource for technical support.
The entire Xilinx Community is available to help here, and you can ask questions and collaborate with Xilinx experts to get the solutions you need.