ID:61007 In altfp_add_sub megafunction, the ADD_SUB port must be connected when the DIRECTION parameter is <text>

CAUSE: You did not connect the add_sub input port while the value of DIRECTION parameter of the altfp_add_sub megafunction is VARIABLE. The value of the DIRECTION parameter must be set to a either ADD or SUB if the add_sub port is not connected. This error usually occurs when you instantiate a megafunction directly in a text file rather than using the MegaWizard Plug-In Manager .

ACTION: Change the value of the DIRECTION parameter to ADD or SUB. Otherwise, connect the add_sub input port.