When a System Generator design is "generated" from the Vivado tool, the System Generator token is in hidden mode.
I unable to correct errors in the System Generator token while in hidden mode.
Why does this happen?
In "generate" mode the System Generator token is "hidden", and as a result errors cannot be corrected (for example changing clocking from DCM to Clock Enable).
The only solution is to exit MATLAB, double-click on the model in the Vivado tool to launch System Generator again, and then change the setting.
For System Generator for DSP Release Notes from other versions, see (Xilinx Answer 29595).