altera_pcie_a10_skp.sdc >> Error: Unable to find the parent of tx_serial_clk in 100 attempts!

Description

You might see this warning message reported when compiling the Intel® Arria® 10 PCIe Hard IP core in Avalon® streaming mode in the Intel® Quartus® Prime Pro Edition Software version 17.1 and earlier.

The warning occurs due a problem in the auto-generated sdc file.

Resolution

This problem is scheduled to be resolved in a future release of the Intel Quartus Prime Software.
These warnings can be safely ignored.