ID:11814 Cannot select more than three clock and clock enable pairs in the <name> device family.

CAUSE: You selected more than three clock and clock enable pairs for the specified device family, but this feature is not supported. This error occurs when you instantiate a megafunction directly in a text file.

ACTION: Use the MegaWizard Plug-In Manager to regenerate the ALTERA_MULT_ADD megafunction with supported features for the specified device family.