If the xilinxd is up, jump down to "Client Problems."
You might also open a command window and type "lmutil lmdiag." This will confirm that the environment variables are set correctly and that the license is available to be checked out.
Check the license file:
Have you obtained a full license? New users should register their software and obtain full licenses from Xilinx Customer Service by calling 1-800-624-4782. If you have already registered, you can obtain a license via the Xilinx Web site at: