Problem with XML sample

[warn] (147) Transaction: ta(-14): uncaught exception: (DOMException(11): DOMException: Exception reason is unspecified. (code 11)
org.ozoneDB.xml.dom.TextImpl)
    DOMException(11): DOMException: Exception reason is unspecified. (code
             11)
    org.ozoneDB.xml.dom.TextImpl
        at org.ozoneDB.xml.dom.DocumentImpl_Proxy.createElement(DocumentImpl_
            Proxy.java:803)
        at org.ozoneDB.xml.util.SAXChunkConsumer.startElement(SAXChunkConsume
            r.java:293)
        at org.ozoneDB.xml.util.SAXChunkConsumer.processChunk(SAXChunkConsume
            r.java:170)
        at org.ozoneDB.xml.util.XMLContainerHelperImpl.putChunk(XMLContainerH
            elperImpl.java:134)
        at java.lang.reflect.Method.invoke(Native Method)
        at org.ozoneDB.core.AbstractObjectContainer.invokeTarget(AbstractObje
            ctContainer.java:212)
        at org.ozoneDB.core.Transaction.invokeObject(Transaction.java:512)
        at org.ozoneDB.core.DbRemote.DbInvoke.perform(DbInvoke.java:62)
        at org.ozoneDB.core.Transaction.performCommand(Transaction.java:273)
        at org.ozoneDB.core.TransactionManager.performCommand(TransactionMana
            ger.java:368)
        at org.ozoneDB.core.TransactionManager.handleCommand(TransactionManag
            er.java:256)
        at org.ozoneDB.core.InvokeServer.handleClientEvent(InvokeServer.java:
            76)
        at org.ozoneDB.DxLib.net.DxMultiServerClient.run(DxMultiServerClient.
            java:44)
        at java.lang.Thread.run(Unknown Source)