@dharrigan - Lots of times when this happens it is because libpython-clj is loading an old python shared library or the incorrect python shared library. Is the a libpython3.5.so (or .dylib if you are on mac) located at /home/david/tmp/kevin2/.direnv/pyton-3.9.5?

See this: https://clj-python.github.io/libpython-clj/environments.html - the issues linked have a lot of information.

Thank you. Will read and review.

This is a very common issue. The key thing is to figure out which shared library it is loading and make sure it is the right one.