ID:23527 No route for refclk connection from "<Refclk ibuf name>" to "<IOPLL name>". Promote refclk to a global clock or use a dedicated IOPLL refclk pin.
CAUSE: IOPLL refclk input should not take the data route through core.
ACTION: Promote refclk to a global clock or choose a dedicated IOPLL refclk pin.