[oXygen-user] "content is not allowed in prolog" using Oxygen for MXML files

James Cummings
Thu Jun 1 13:46:53 CDT 2006

Joshua Noble wrote:
> I'm trying to use Oxygen to edit MXML files (Macromedia Flex). 
> Everything works fine except that this error always appears: content is 
> not allowed in prolog. What's up with this? Here's the line it chokes on:
> <?xml version="1.0" encoding="utf-8"?>
> This is the way all Flex files start and there don't seem to be any 
> problems there. Anybody know what's up?


Triple check that there is no whitespace before this line. It's 
opening < should be the very first character.


Dr James Cummings, Oxford Text Archive, University of Oxford

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