Error (12077): Node instance "PipelinedAdderi" instantiated with unknown parameter "or_aclr_inputs" - Error (12077): Node instance "PipelinedAdderi" instantiated with unknown parameter "or_aclr_inputs" Description You may see this error in DSP Builder v13.1 and later, if you compile your design that DSP Builder v13.0 and earlier generated in the Quartus II software version 13.1 and later. A new parameter in the Pipelined Adder block v13.1 causes the error. This problem affects the Altera DSP Builder Standard Blockset only . Resolution To work around this problem: In your directory where DSP Builder generated HDL is located, open alt_dspbuilder_sLpmAddSub.vhd Add the following line to the list of generics in alt_dspbuilder_sLpmAddSub entity declaration \'or_aclr_inputs : boolean := true\' Note: This workaround does not affect the behavior of your HDL. This problem is scheduled to be fixed in a future version of DSP Builder Custom Fields values: ['novalue'] Troubleshooting novalue True ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 13.1 ['Programmable Logic Devices'] ['DSP Builder for Pro Edition'] ['novalue'] ['novalue']