XML comparison failing on namespace URI not being mapped to any prefix

Hi all,
I have a little XML comparison tool called 'diffx'. I run it from the command line and when I give it 2 XML files it throws an exception stating:-
"namespace URI . . . has not been mapped to any prefix"
Can any one please take a look at the tool and see how I can get it to avoid this
Below is the two lines of XML it is comparing and the entire error message.
Many thanks in advance!!!

Error Message:-
                                com.topologi.diffx.xml.UndeclaredNamespaceException: The n
amespace URI "http://www.xxxx.org/2007/FpML-4" has not been mapped to any prefix.
        at com.topologi.diffx.xml.NSAwareXMLWriter.getQName(NSAwareXMLWriter.java:599)
        at com.topologi.diffx.xml.NSAwareXMLWriter.openElement(NSAwareXMLWriter.java:373)
        at com.topologi.diffx.event.impl.OpenElementEventNSImpl.toXML(OpenElementEventNSIm
        at com.topologi.diffx.format.SmartXMLFormatter.format(SmartXMLFormatter.java:203)
        at com.topologi.diffx.algorithm.DiffXFitopsy.process(DiffXFitopsy.java:304)
        at com.topologi.diffx.Main.diff(Main.java:314)
        at com.topologi.diffx.Main.diff(Main.java:289)
        at com.topologi.diffx.Main.main(Main.java:332)

XML lines that it is comparing:-
<trade xmlns="http://www.xxxx.org/2007/FpML-4">    (its the same in both XMl files)
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Can you delete your duplicate you posted first?
paddykoolAuthor Commented:
Opps :(

Just realised that!!!
Apologies,  done

If you look on the authors' homepage, you'll notice that they are quite modest. To cite Churchill, they've probably got much to be modest about if your earlier issue with the crimson parser is anything to go by.

My guess is that either they've not implemented namespaces or not implemented them properly and my advice is to follow their advice and use a better diff tool

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paddykoolAuthor Commented:
All over it!!!
Just got another little tool that does the trick.
Many thanks for your help today :)
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