Script:
function testfile()
local lFile = xmlLoadFile("settings.xml")
if (lFile == false) then
lFile = xmlCreateFile("settings.xml", "settings")
end
if (lFile ~= false) then
--Stuff.
xmlSaveFile(lFile)
xmlUnloadFile(lFile)
else
outputChatBox("Error")
end
end

addCommandHandler("file", testfile)

1. Start the script.
2. Use: /file
3. Go to the XML file and mess it up. (E.G.: You will see "<settings></settings>", change it to "<setti" or just empty the file)
4. Use: /file

Now a new file will be created called 'settings.xmlnew' and the normal file is not replaced.