FATAL_ERROR:MapLib:.c:528:1.33 - simulate to inv, but no in pin. Process will terminate. For technical support on this issue, please open a WebCase with this project attached at http://www.xilinx.com/support.
What is the cause of this error?
This error might be due to the incorrect trimming of the LUT6_2 or of the feedback path in the circuit.
The following environment variables prevent the incorrect trimming which might resolve the problem.