ID:84039 DSP block can only fit one multiplier in <name> mode in <name> device family

CAUSE: You specified more than one multiplier in the specific mode of the altmult_add megafunction; however, you cannot use the specified mode with more than one multiplier in the specified device family. This error usually occurs when you instantiate a megafunction directly in a text file rather than using the MegaWizard Plug-In Manager .

ACTION: To avoid receiving this message in the future, change the number of multipliers to 1. Intel recommends using the MegaWizard Plug-In Manager.