ID:176451 Can't merge Clock Control Blocks <name> and <name> -- <name> uses more than one input clock

CAUSE: The Fitter attempted to merge the two specified Clock Control Blocks. However, the second Clock Control Block uses more that one input clock. For Clock Control Blocks to be merged by the Fitter, they both must use the same number of input clocks. 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 second specified Clock Control Block uses only one input clock.