Error Running Nios II Project: Downloading ELF Process failed - Error Running Nios II Project: Downloading ELF Process failed Description If the Nios II processor’s cpu.data_master port is not connected to all program memories (memories to which the . elf file is downloaded) the software project fails to run on Nios II hardware. Failure to connect cpu.data_master to all program memories is a design error that the Nios II SBT does not detect. Resolution Connect cpu.data_master to all program memories. Custom Fields values: ['novalue'] Troubleshooting novalue True ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 10.0 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']