Abstarct method error

[P Sreenivasa Rao]

Hi all,   I'm getting the following error.   Exception in thread "main" java.lang.AbstractMethodError         at org.apache.soap.util.xml.DOM2Writer.print(DOM2Writer.java:139)         at org.apache.soap.util.xml.DOM2Writer.serializeAsXML(DOM2Writer.java:98 )         at org.apache.soap.Utils.marshallNode(Utils.java:109)         at org.apache.soap.encoding.literalxml.XMLParameterSerializer.marshall(X MLParameterSerializer.java:109)         at org.apache.soap.rpc.RPCMessage.serializeParams(RPCMessage.java:333)         at org.apache.soap.rpc.RPCMessage.marshall(RPCMessage.java:307)         at org.apache.soap.Body.marshall(Body.java:145)         at org.apache.soap.Envelope.marshall(Envelope.java:195)         at org.apache.soap.transport.http.SOAPHTTPConnection.send(SOAPHTTPConnec tion.java:246)         at org.apache.soap.rpc.Call.invoke(Call.java:205)         at samples.addressbook.GetAccountBalanceElement.main(GetAccountBalanceEl ement.java:127)   what could be the culprit?I'm using Tomcat3.2.2 ans Apache soap toolkit...   TIA, Sreenivas

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