Saxon

In the method net.sf.saxon.resource.ActiveSAXSource.deliver(Receiver, ParseOptions) there is this throw:

 throw new XPathException("I/O error reported by XML parser processing " +
                                             getSystemId() + ": " + err.getMessage(), err);

which adds the source message to the initial message. But the method "net.sf.saxon.trans.XPathException.getMessage()" again uses the exception source message. So you end up with a reported error message which contains the same message twice like:

I/O error reported by XML parser processing : file not found: file not found