I have Quartus and Nios 16.1 Lite edition installed and working fine. However, there is a small bug in 16.1 that is apparently resolved in newer versions. I tried upgrading to 18.1 but when I want to create a new project with BSP from the hello_world_small template or any other templates, I get the error screens below on accessing the Makfile and the project build fails. I run the Nios software with administrator rights and have no idea what the source of the probelm is. I appreciate any advise on Fixes/Workarounds. If it matters, my operating system is a windows 10.
Try to Regenerate the BSP to update the Makefile and then build again. To regenerate from Eclipse Right-click the BSP project.>Nios II Menu->click Generate BSP.
If possible share the project.