Quartus

One or more clock settings are derived from the absolute clock settings <name>. Deleting the absolute clock settings also deletes all derived clock settings.

CAUSE: In the Clocks page of the Settings dialog box, you selected an absolute clock setting, from which one or more clocks are derived, from the Existing clock settings list and clicked Delete. The Quartus II software is warning you that deleting the absolute clock setting will also delete the clock settings derived from the absolute clock settings.
ACTION: Click OK to delete the selected settings for absolute and derived clocks, or click Cancel to return to the Settings dialog box without deleting any clock settings.

- PLDWorld -

 
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