problem generating wsdl from Url

[Leslie Tighe <le...@yahoo.com>]

hello,
 
I had a number of webservices running well and then in the past day I started getting the error that I have pasted below when I call the url to show the wsdl; ie. http://localhost:8080/ws/service/AuthLogin?wsdl.  
 
Any idea as to what maybe  causing this? when I deploy the same on websphere it seems to come up just file.
 
Thanks in advance for your help
leslie. 
 
8:47:35,445 INFO  [Server] JBoss (MX MicroKernel) [4.0.1 (build: CVSTag=JBoss_
0_1 date=200412230944)] Started in 41s:179ms
8:47:53,141 WARN  [ServiceDesc] Return type is not convertible to: class java.
ng.String
8:47:55,594 INFO  [JavaProvider] Mapping Exception to AxisFault
ava.lang.NullPointerException
       at org.apache.axis.wsdl.fromJava.Types.writeTypeForPart(Types.java:323)
       at org.apache.axis.wsdl.fromJava.Types.writeWrappedParameter(Types.java
87)
       at org.apache.axis.wsdl.fromJava.Emitter.writeWrapperPart(Emitter.java:
09)
       at org.apache.axis.wsdl.fromJava.Emitter.writeResponseMessage(Emitter.j
a:1350)
       at org.apache.axis.wsdl.fromJava.Emitter.writeMessages(Emitter.java:957
       at org.apache.axis.wsdl.fromJava.Emitter.writePortType(Emitter.java:910
       at org.apache.axis.wsdl.fromJava.Emitter.getWSDL(Emitter.java:383)
       at org.apache.axis.wsdl.fromJava.Emitter.emit(Emitter.java:258)
       at org.apache.axis.providers.java.JavaProvider.generateWSDL(JavaProvide
java:560)
       at org.apache.axis.strategies.WSDLGenStrategy.visit(WSDLGenStrategy.jav
74)

		
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