ID:15602 DQS I/O pin "<name>" cannot feed source clock for DLL "<name>"

CAUSE: The specified delay-locked loop (DLL) cannot be controlled by a DQS I/O pin. This error usually occurs when you instantiate a megafunction directly in a text file rather than using the MegaWizard Plug-In Manager or if you specified a DQS Input Reference Clock (DQS_SYSTEM_CLOCK ) logic option assignment with incorrect arguments.

ACTION: Change the DLL input to a non-DQS input pin.