RE: Error at element constructor...

> xmlEstructurado is a String object initialized with "", I 
> forgot to put one code line in my first post, the code is 
> this (again):
> 
>                 String xmlEstructurado = "";

The JAXP spec says "use this value as a writeable URI (probably a file
name)." which leaves a lot of discretion to the implementation, but it
certainly doesn't attach any particular meaning to using "" in this context.
Saxon is taking it as a relative filename relative to your current
directory, and that's failing for obvious reasons. 

Michael Kay
http://www.saxonica.com/

PS Another illustration of a common problem

THE FIRST LAW OF DEBUGGING: if you can't find the bug after two minutes,
it's because you're looking in the wrong place.

CORROLLARY: if you post the problem to a forum, you will snip the very code
that contains the bug.

The best answer to this is to cut the problem down to a minimum
self-contained repro that illustrates the problem, and then post the whole
of the repro. This also greatly increases the chance that people will help
you in your debugging, because it's much easier to find bugs if you can run
the code, rather than just stare at it.