The following errors may happen when you have international characters in repository objects, for example, in user IDs.
Error During Export
Upgrading typically requires doing an export operation on your database. If you are using MySQL and getting this null pointer exception, it may be due to an incorrect character in the file js.jdbc.properties:
Check the URL in this file in <js-install>buildomatic/build_conf/default/; it should look like the following:
Note the ampersand & character. It is incorrect if it appears as &. The & is only correct in an HTML or XML context. It is incorrect in a properties file.