Strange problem when validating XML agains DTD file.

Question

Dear experts,
I'm write a simple code snippet that validates my XML file agains a given DTD.
It allways report the following error:
org.xml.sax.SAXParseException: The markup in the document preceding the root element must be well-formed.
     at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)
     at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)Althought, my xml file is OK with Xmlspy.
My code is:
System.setProperty("javax.xml.parsers.DocumentBuilderFactory",
                         "org.apache.xerces.jaxp.DocumentBuilderFactoryImpl");
      DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
      factory.setNamespaceAware(true);
      factory.setValidating(true);
      factory.setAttribute(
          "http://java.sun.com/xml/jaxp/properties/schemaLanguage",
          "http://www.w3.org/2001/XMLSchema");
      factory.setAttribute(
          "http://java.sun.com/xml/jaxp/properties/schemaSource", SchemaUrl);
      DocumentBuilder builder = factory.newDocumentBuilder();
      Validator handler = new Validator();
      builder.setErrorHandler(handler);
      builder.parse(new java.io.FileInputStream(new java.io.File(XmlDocumentUrl)));And here are the xml file:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE capsule SYSTEM "c:/SampleFiles/capsule.dtd">
<capsule>
     <header>
          <name>Capsule 1</name>
          <author>Author</author>
          <company>Company</company>
          <last-save-time>Fri Apr 01 14:59:21 GMT+07:00 2005</last-save-time>
          <description>description</description>
     </header>
     <datasets>
          <dataset type="input">
               <name>dataset1</name>
               <description></description>
               <columns>
                    <column type="fromsource">
                         <name>partno</name>
                         <data-type>varchar</data-type>
                         <length>80</length>
                         <precision/>
                         <scale/>
                         <allow-null>false</allow-null>
                         <default-value/>
                    </column>
                    <column type="notfromsource">
                         <name>balanceonhand</name>
                         <data-type>integer</data-type>
                         <length/>
                         <precision/>
                         <scale/>
                         <allow-null>false</allow-null>
                         <default-value/>
                    </column>
               </columns>
               <rule>LET a=update; LET b=employye set salary = 100; print a + b</rule>
               <!--output: update employee set salary = 100-->
               <command>inmemory (getvalue_dataset("dataset1".rule))</command>
               <params>
                    <param>
                         <name/>
                         <type/>
                    </param>
               </params>
          </dataset>
     </datasets>
</capsule>What I can do now? Change my xml file?
Please provide some hints.
Thanks in advance.

Answer 1

I tried to remove the DOCTYPE, but the problem stayed the same.
Thanks.