ID:18515 Attempted to route one dedicated refclk pin, <Dedicated refclk name>, to <Number of IOPLL locations> IOPLLs. In order to feed multiple IOPLLs, this signal must be promoted to a global clock.

CAUSE: One dedicated refclk pin in the design feeds multiple IOPLLs.

ACTION: Promote this refclk to a global clock in the Assignment Editor.