Preservation level: Final leads to Quartus crash on re-run

Yes it's an ini password, it would disable dangling routes.

Based on the IE case report, this IE is suspected to be a side effect of a PR-related fix. If you have a core clock driving to the periphery then there will be dangling route issue and Quartus throws this IE.

All you need to do is change the extension of the above quartus.txt file to .ini, save it to the same directory as your .qpf file and run compilation.

Regards,

Nurina