Why do I receive an error message when attempting to generate a design multiple times to the same directory?
This error occurs because of a known issue in 11.1 where a file is left "open", so the same directory cannot be used on subsequent generations.
To work around this issue, change the netlist output directory on subsequent runs. If MATLAB is closed and relaunched, you should have access to a previously used directory for generation.
This issue will be resolved in a future release.