Receiving clock buffer error when compiling in Quartus Prime

Hi Mark, As I understand it, you have some inquiries related to the serial clock connection from the ATX PLL to the C10GX Native PHY (if I understand it correctly). For your information, it is recommended for you to connect the ATX PLL's serial clock output directly to the serial clock input of the Native PHY without the ALTCTRL IP. There is dedicated clock network from the ATX PLL to the Native PHY. Please let me know if after direct connection you still observe similar error. Thank you. Best regards, Chee Pin