How to open a par file created with earlier version
I'm attempting to use the following example:
Arria 10 Nios II Simple Socket Server Design Example
However, when I attempt open the a10_sss_171.par file with Quartus 18.0 Standard, I get an error:
"Design template instantiation failed"
How can I open a design file created with an earlier version?
This may be a versioning issue or it may be that the template is for the Pro edition of the tool and you want to use it in Standard edition (Arria 10 being the only family that is supported in both Standard and Pro).
The .par files have always been version specific. Maybe you could install 17.1 Pro and create the project with the template, then bring it into 18.0 Pro (instead of Standard). You can't take a Pro project and convert it back to Standard (though you can convert a Standard project into a Pro project).