I am exactly following the steps in this link
https://www.intel.com/content/www/us/en/docs/programmable/683113/21-3-19-2-0/simulating-the-design.html
to try and simulate the JESD example design...
We have checked from our end and we do not observe any error as you mention.
JESD modelsim screenshot
From your error message, it looks like the file generated could possibly be incomplete or corrupted.
Allow me to clarify a few items below:
Q1. Have you try to re-generate the example design again with new project?
Q2. Did you made any modification on the testbench script?
Q3. May I know are you using windows or linux environment?
Could you try it with a newer version of Quartus (e.g- 22.3/22.4)?
The Quartus version that you are using is consider a very old version/legacy product. We advise you to use a newer version of Quartus to avoid any bug or major design migration that could lead to errors in the design.
Q4. Could you briefly list down the steps when you generate the example design?
We would like to trace and follow the exact steps to replicate it.