Warning: Ignored filter at instance_name_p0.sdc(675): {instance_name_clkout[0]} {instance_name_clkout[1]} could not be matched with a clock - Warning: Ignored filter at instance_name_p0.sdc(675): {instance_name_clkout[0]} {instance_name_clkout[1]} could not be matched with a clock Description When running TimeQuest on a DDR3 UniPHY design in the Quartus® II software version 11.0, you may get the following warning: Warning: Ignored filter at instance_name_p0.sdc(675): {instance_name_clkout[0]} {instance_name_clkout[1]} could not be matched with a clock Resolution The workaround for this issue is to modify the instance_name _pin_map.tcl file. Here are the steps to modify the tcl file: open the instance_name _pin_map.tcl file in an editor locate the instance_name _p0_get_all_instances_dqs_pins function in the tcl file Change the following line from : lappend dqs_pins (ck_pins) To : foreach { ck_pin } (ck_pins) { lappend dqs_pins } Re-compile the design This issue will be fixed in a future version of the Quartus II software. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 11.0 ['Stratix® V FPGAs', 'Stratix® V GX FPGA'] ['novalue'] ['novalue'] ['novalue']