Error (17950): Pin corresponding to CLKUSR has not been reserved in the device. Cannot perform unused RX clock workaround.

Description

In the Quartus® Prime Standard Edition Software, you may see this error when no transceiver is used in the design but the following entry is in the Quartus Setting File (.qsf):

set_global_assignment -name AUTO_RESERVE_CLKUSR_FOR_CALIBRATION OFF   

This assignment prevents the CLKUSR from being automatically reserved. 

Resolution

To avoid this error, remove this assignment from the .qsf