File "AIO/xml/dom/expatbuilder.py", line 207, in parseFile xml.parsers.expat.ExpatError: mismatched tag: line 12, column 10</nowiki>
To speed things up and get a better error message, make sure you use a text editor that includes an XML mode and syntax check. If you use "<code>NotePad++</code>" on windows, make sure you install the "<code>XML Tools</code>" plugin (it will tell you were as well as why, unlike the log above).
Unfortunately, this plugin has poor error handling and may also die (unhandled exception) when "New" is pressed for other types of data errors in the XML. The error message may give you a clue as to where the issue is (start from the bottom), the following is a cryptic example: