The reason MySQLDA would not run on my Redhat 9 was that I was missing a library called: zlib-devel Without it, MySQL-python would not build or install. I made the mistake of trusting the Redhat MySQL-python rpm-- which was a bad choice. I installed the appropriate zlib-devel RPM, as a guess based on an obscure thread somewhere, built and installed MySQL-python (without errors this time), then copied ZMySQLDA to /var/zope/lib/python/Products and restarted. ZMySQLDA works! I don't think this had anything to do with my PYTHONPATH as others had suggested. The redhat MySQL-python RPM had installed _mysql.so but to the /usr/lib/python1.5/site-packages directory. Adding this to the PYTHONPATH did not help. One trick is to make sure to build MySQL-python using the Python that installs with the binary. For example: /var/zope/bin/python setup.py build /var/zope/bin/python setup.py install The RPM from redhat probably was built with some other version of Python. If you build MySQL-python with some other version of Python, you may have trouble depending on how you are running Zope, i.e Python included with the binary release or external python. It seems that this ZMySQLSA problem is occuring a lot lately and has many differnt causes. My situtaion may or may not be unique, but perhaps this will help. Is this going to get even more confusing with Zope 7? My understanding is that we are getting power over simplicity. This sort of thing should be simple, and not a struggle. Harlow Pinson Indepth Learning Email: hpinson@indepthl.com Web: http://www.indepthl.com Voice: 505-994-2135 FAX: 208-475-7678