[Simple-support] XMLStreamException:Content not allowed in prolog

[Wessam A. R. <wes...@gm...>]

Hi,
I use Apache DDLutils library to generate XML file from live databases then
feed this file to Simple to deserialize. I get an exception as Simple starts
to parse the XML file prolog. the following is the exception's stack trace:

javax.xml.stream.XMLStreamException: ParseError at [row,col]:[1,1]
Message: Content is not allowed in prolog.
 at com.sun.xml.stream.XMLReaderImpl.next(XMLReaderImpl.java:563)
 at com.sun.xml.stream.XMLEventReaderImpl.nextEvent(XMLEventReaderImpl.java
:86)
 at org.simpleframework.xml.stream.NodeReader.readElement(NodeReader.java
:117)
 at org.simpleframework.xml.stream.NodeReader.readRoot(NodeReader.java:74)
 at org.simpleframework.xml.stream.NodeBuilder.read(NodeBuilder.java:74)
 at org.simpleframework.xml.stream.NodeBuilder.read(NodeBuilder.java:61)
 at org.simpleframework.xml.load.Persister.read(Persister.java:337)
 at org.simpleframework.xml.load.Persister.read(Persister.java:258)

This is the prolog of the generated XML file:

<?xml version="1.0" encoding="UTF-8"?>

What is the not allowed content in prolog? and how can i overcome this
problem?

Thanks in advance,
Wessam