Hi,

> Reading this thread, I understand that my problem is related, 
> which was
> posted as "xpath expression validity?"
> 
> How do I handle the failed document() or invalid XPath 
> expression error?
> I am using XSL only with MSXML4, Xercers-J (1.4.4 or others 
> if recommended)
> and XMLSpy v5

If I remember your original question correctly, just write your stylesheet so that there's a sanity check before the expression that evaluates document(), so that you never attempt to evaluate the document() function with a non-URI argument.

Cheers,

Jarno

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