ID:15498 inclk1 port of enhanced PLL "<name>" must be driven by a non-inverted input pin

CAUSE: The inclk1 port of the specified enhanced PLL is driven by an illegal source. The inclk1 port of an enhanced PLL must be driven by a non-inverted input pin. This error usually occurs when you instantiate a megafunction directly in a text file rather than using the MegaWizard Plug-In Manager .

ACTION: Modify the design so that the inclk1 port of the specified enhanced PLL is driven by a non-inverted input pin.