Error (169280): There are 39 true differential input buffers in the design, but only 37 true differential input buffer locations available on the device

Description

Due to a known problem in Intel® Quartus® Prime Software version 18.0, you may see this error when targeting Cyclone® V SE devices if using differential I/O pins and HPS pins. 

Resolution

This error occurs because the HPS pins are incorrectly assumed to be differential I/O pins.