Protocol doesn't support output

[Bruno Verachten]

Hi,

I'm using  xalan-j_2_2_D9, and I get this error when I use the following 
code:
---------
java.net.UnknownServiceException: protocol doesn't support output
        at java.net.URLConnection.getOutputStream(Unknown Source)
        at 
org.apache.xalan.xsltc.trax.TransformerImpl.getOutputHandler(TransformerImpl.java:232)
        at 
org.apache.xalan.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:166)
        at 
net.atos.mm.fwk.xml.bench.xsl.BenchXSLTC.fromFileToFile(BenchXSLTC.java:228)
        at 
net.atos.mm.fwk.xml.bench.xsl.BenchXSLTC.runTest(BenchXSLTC.java:140)
        at net.atos.mm.fwk.xml.bench.xsl.BenchBase.run(BenchBase.java:245)
----------
        private void fromFileToFile(String sourceID, String xslID)
                throws TransformerException, 
TransformerConfigurationException {

                // Create a transform factory instance.
                TransformerFactory tfactory = 
TransformerFactory.newInstance();

                // Create a transformer for the stylesheet.
                Transformer transformer =
                        tfactory.newTransformer(new StreamSource(xslID));

                // Transform the source XML to System.out.
                try {
                        transformer.transform(new StreamSource(sourceID),
                                                                    new 
StreamResult(new File("fromFileToFile.out").toURL().toString()));
                } catch (java.net.MalformedURLException e) {
                }
      }

What did I miss?
Thanks.

B.Verachten