Due to a problem in the Intel® FPGA Power and Thermal Calculator (PTC) version 21.4 and earlier, you may see many occurrences of this warning after importing a .qptc file generated from a project which contains the External Memory Interfaces Intel® Stratix® 10 FPGA IP.
These warnings can be safely ignored as they do not negatively impact the power calculation.
This problem is scheduled to be fixed in a future release of Intel® FPGA Power and Thermal Calculator (PTC).