We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 31929

10.1 XST - Unable To Read License Information For Product


keywords: xst, .ui.dat, license, behavior, run, work

When I attempt to run synthesis, I see the following message in the log:


Unable to read license information for product located at


Process "XST - Synthesis" failed


This occurs if no license is found. Please ensure that a valid license file (.ui.dat) is located at <XILINX_INSTALL_PATH> (example: C:\Xilinx\10.1)

AR# 31929
Date Created 04/09/2009
Last Updated 06/28/2010
Status Archive
Type General Article