If your question isn't answered here, you may wish to refer to GNUe Common's FAQ or the main project FAQ
Q: What is the GNU Enterprise Application Server?
A: GNUe AppServer is like a database on steroids. For actual data storage, it uses a standard SQL database, but on top of that it adds features like calculated fields or procedures called upon defined events, both freely implementable using the full power of Python.
Q: When I startup GNUE Appserver on Microsoft Windows Appserver stops with error: (10022,'Invalid argument'). What happened?
A: Probably your personal firewall didn't allow Python to open a port in server mode. Reconfigure your personal firewall to allow Python open the port 8765.