-create new ws from wsdl in an ejb module
-add new operation to it (newOperation(int): int)
-clean & build the project

=> fails on wsimport with:

[ERROR] binding operation "newOperation" must specify a name for its input message
  line 109 of file:/home/lukas/NetBeansProjects/EJBModule3/src/conf/xml-resources/web-services/Numbers/wsdl/AddNumbers.wsdl

after inspecting the WSDL file I can see there:
<portType name="AddNumbersPortType">
...
   <operation name="newOperation">
     <input name="newOperation" message="tns:newOperationMessage"/>
     <output name="newOperationResponse" message="tns:newOperationResponseMessage"/>
   </operation>
   <operation name="newOperation">
     <input message="tns:newOperation"/>
     <output message="tns:newOperationResponse"/>
   </operation>
</portType>
<binding...>
   ...
   <operation name="newOperation">
     <soap:operation soapAction=""/>
     <input xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/">
       <soap:body use="literal"/>
     </input>
     <output xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/">
       <soap:body use="literal"/>
     </output>
   </operation>
   <operation name="newOperation">
     <input/>
     <output/>
   </operation>
</binding>