Nothing happens if I select in Quartus Tools > Nios II Software Build Tools for Eclipse.
Which version of Quartus have you installed and have you installed the EDS tools also?
I have Quartus 18.1.0 installed. And Nios2eds gets automatically installed with it.
Can you show us what error you see?
The problem is that I see no errors. It just does not start.
Can you please re-download the Quartus and install it. the file you have might be corrupted.
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