Error in nios II eclipse generation

Hi,

Greetings and welcome to Intel's forum.

Here is the link where you could find more information and the solution for this issue: https://www.intel.com/content/www/us/en/support/programmable/articles/000090071.html

Kindly follow the resolution steps below by download and installing the patch version for 21.1 with the link provided.

Thank you.

Regards,

Kelly