ID:84020 the <name> device family doesn't support two input scan chain

CAUSE: You tried to use two input scan chains of the altmult_add megafunction with the specified device family. However, only one input scan chain is supported. MegaWizard Plug-In Manager .

ACTION: If you want to use two input scan chain, change the device family or remove one scan chain. To avoid receiving this message in the future, Intel recommends using the MegaWizard Plug-In Manager.