Why do I get "#### Java Web Start Error" at startup time?

This means you updated your web package and overwritten your new (virgin) config files with the older one. Most of the time it works but when some new parameters are added in a release, it is not there anymore and the systems needs it. Reinstall properly the web package, start a client from your browser, edit the conf file using the GUI, save the conf file and copy it to the web package install.