Why is my set_clock_groups command ignored during static timing analysis? - Why is my set_clock_groups command ignored during static timing analysis? Description Due to a problem in the Quartus® II software versions 11.1 SP2 and earlier, the set_clock_groups command may be ignored with no warning or error message if you use incorrect syntax by including a command that returns a group or collection within braces {}. In the following example, the set_clock_groups command is ignored: set_clock_groups -asynchronous -group {[get_clocks {clkA}]} -group {clkC} Resolution To avoid this behavior, use the correct syntax as shown below: Remove the braces {} from around the command that returns a collection: set_clock_groups -asynchronous -group [get_clocks {clkA}] -group {clkC} Replace the get_clocks command with a list: set_clock_groups -asynchronous -group {clkA} -group {clkC} Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']