ELF executable missing

I assume you do have a valid software project, like maybe a hello world or something. Does your software project compile without errors?

The steps are:

1 - Complete your FPGA design using Quartus and SoPC builder.

2 - Provide timing constraints for your FPGA design.

3 - Compile your FPGA design.

4 - Program your FPGA design into the FPGA using the Quartus programmer.

5 - Create a software project and associated system library project using the NIOS II IDE.

6 - Compile your software project in the NIOS II IDE.

7 - Download and Run/Debug your software project to the NIOS II processor running inside your FPGA.

Jake