These errors are typically caused by a problem in the system environment setup. Check your version of System Generator by typing the following at the MATLAB command prompt: >> xlVersion Check your version of MATLAB by typing the following at the MATLAB command prompt: >> ver Check your version of the Xilinx ISE tools by typing the following at the MATLAB command prompt: >> system('xinfo') and go to the fileset.txt tab to confirm the version listed for each Xilinx tool. Next, make sure you have the latest service packs for all Xilinx tools and double-check that you are using compatible versions of all tools (including service packs and IP updates). See (Xilinx Answer 17966). Finally, check that the following environment variables are set as follows, under the "System Variables." NOTE: To access your Windows environment variables, open the "System Properties" from the Control Panel and go to the Advanced tab. PATH environment variable The PATH environment variable should include the following paths in one concatenated list: