Quartus

Clocklock <name> requires a duty cycle of 50%, but clock <name> has a duty cycle of <number>


CAUSE: You created a clock setting that defines a duty cycle other than 50%. However, all clocks feeding a ClockLock must have a duty cycle of 50%.
ACTION: Change the clock settings assigned to the specified clock so that the duty cycle of the clock is 50%. Alternatively, you can remove the clock frequency requirement so that the Quartus II software automatically creates an appropriate clock during compilation.

See also:

Creating Clock Settings
Deleting Clock Settings
Editing Clock Settings
Overview: Using the Timing Analyzer

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