Why cann I open the xilinx project?
Xilinx can not read a blank space directory such as “My Documents”. Also, you may want to save each project in seperate directory. For those who work in ECE PC lab, remember to save your projects in Z drive. Q2: “# ** Error: License checkout has been disallowed because # only one session is allowed to run on an uncounted nodelock” A: You open multiple ModelSim windows. Closed all ModelSim windows and resimulate your design in Xilinx Project Navigator window.