ID:186081 Differential I/O node "<name>" in location <name> cannot be reached by fast PLL "<name>" using any differential I/O clock networks

CAUSE: The Fitter cannot place the specified differential I/O node in the specified location so that it is reached by the specified fast PLL because not all differential I/O nodes driven by a fast PLL can be reached by any differential I/O clock networks.

ACTION: Change the location assignment for the fast PLL or its differential I/O nodes, or modify the design to reduce the number of differential I/O nodes driven by the fast PLL.