Error Using WSDL2Java

[Maryam Moazeni]

Exception in thread "main" java.lang.NullPointerException
        at org.apache.axis2.wsdl.builder.wsdl4j.WSDLPump.createSchemaForPorttype
(WSDLPump.java:732)
        at org.apache.axis2.wsdl.builder.wsdl4j.WSDLPump.generateWrapperSchema (W
SDLPump.java:662)
        at org.apache.axis2.wsdl.builder.wsdl4j.WSDLPump.populateDefinition(WSDL
Pump.java:187)
        at org.apache.axis2.wsdl.builder.wsdl4j.WSDLPump.pump(WSDLPump.java:135)

        at org.apache.axis2.wsdl.builder.wsdl4j.WSDL1ToWOMBuilder.build(WSDL1ToW
OMBuilder.java:124)
        at org.apache.axis2.wsdl.builder.wsdl4j.WSDL1ToWOMBuilder.build(WSDL1ToW
OMBuilder.java:93)
        at org.apache.axis2.wsdl.codegen.CodeGenerationEngine.getWOM(CodeGenerat
ionEngine.java:162)
        at org.apache.axis2.wsdl.codegen.CodeGenerationEngine.<init>(CodeGenerat
ionEngine.java:70)
        at org.apache.axis2.wsdl.WSDL2Code.main (WSDL2Code.java:32)
        at org.apache.axis2.wsdl.WSDL2Java.main(WSDL2Java.java:21)
 

Can anyone please help me figure out the problem. Shall I add anything to my CLASSPATH?

 

Thanks in advance

--Maryam