ID:176453 Can't merge Clock Control Blocks <name> and <name> -- <name> feeds logic that is not <name>

CAUSE: The Fitter attempted to merge the two specified Clock Control Blocks, which are connected to one another in the design. However, the first (source) Clock Control Block feeds logic that is not the second (destination) Clock Control Block. This message can occur when the Fitter attempts to merge two Clock Control Blocks because they are described by logic in the design that needs to be implemented in a single Clock Control Block.

ACTION: Modify the design so that the source Clock Control Block feeds only the destination Clock Control Block.