Troubleshooting Documentum xDB
Cannot save the file. DTD factory class
               org.apache.xerces.impl.dv.dtd.DTDDVFactoryImpl does not extend from
               DTDDVFactory
Question:
I am able to access my XML Database in the Data Source Explorer and
               open files for reading but when I try to save changes to a file back into the database,
               I
               receive the following error: "Cannot save the file. DTD factory class
               org.apache.xerces.impl.dv.dtd.DTDDVFactoryImpl does not extend from
               DTDDVFactory." How can I fix this?
            
Answer:
               xhive.jar contains a MANIFEST.MF with a classpath:
               
Class-Path: core/antlr-runtime.jar core/aspectjrt.jar core/fastutil-shrinked.jar
    core/google-collect.jar core/icu4j.jar core/lucene-regex.jar core/lucene.jar
    core/serializer.jar core/xalan.jar core/xercesImpl.jarSince
               the driver was configured to use xhive.jar directly from the xDB
               installation (where many other jars are located), core/xercesImpl.jar
               from the xDB installation directory is loaded even though it is not specified in the
               list of jars from the data source driver configuration (it is in the classpath from
               xhive.jar - MANIFEST.MF). A simple workaround for this
               issue is to copy ONLY the jar files used in the driver configuration to a separate
               folder and configure the data source driver to use them from there. 
            
            
         