ID:15497 inclk0 port of PLL "<name>" must be driven by a non-inverted input pin or, in a fast PLL, the output of a PLL

CAUSE: The inclk0 port of the specified PLL is driven by an illegal source. The inclk0 port of an enhanced PLL must be driven by a non-inverted input pin. The inclk0 port of a fast PLL must be driven by the output a non-inverted input pin or PLL.

ACTION: Modify the design so that the inclk0 port is driven by a non-inverted input pin or, if the inclk0 port is in a fast PLL, the output of a non-inverted input pin or PLL.