Why does MegaWizard report the multiplier output register option is no longer available when I upgrade my multiplier to Quartus 13.1? - Why does MegaWizard report the multiplier output register option is no longer available when I upgrade my multiplier to Quartus 13.1? Description The multiplier output register option is not available on 28nm ("V" series) devices. Resolution To resolve the error, disable the multiplier output register option and regenerate the core. If you wish to preserve the original latency introduced by the register, use the Pipelining tab to add a pipeline register with 1 clock latency. If an output register is desired, this can only be done for the adder output, on the Extra Modes tab. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 13.1 ['Arria® V GT FPGA', 'Arria® V GX FPGA', 'Arria® V GZ FPGA', 'Arria® V ST FPGA', 'Arria® V SX FPGA', 'Cyclone® V E FPGA', 'Cyclone® V GT FPGA', 'Cyclone® V GX FPGA', 'Cyclone® V SE FPGA', 'Cyclone® V ST FPGA', 'Cyclone® V SX FPGA', 'Stratix® V E FPGA', 'Stratix® V GS FPGA', 'Stratix® V GT FPGA', 'Stratix® V GX FPGA'] ['DSP Builder for Pro Edition'] ['novalue'] ['novalue']