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.