java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at weblogic.webservice.tools.stubgen.StubGenHelper.getNameAndTypes(StubGenHelper.java:713)
at weblogic.webservice.tools.stubgen.StubGenHelper.getReturnTypeFromBean(StubGenHelper.java:653)
at weblogic.webservice.tools.stubgen.StubGenHelper.isSinglePropertyOutBean(StubGenHelper.java:645)
at weblogic.webservice.tools.stubgen.StubGenHelper.canWriteConvenienceMethod(StubGenHelper.java:542)
at weblogic.webservice.tools.stubgen.StubInterface.generate(StubInterface.java:40)
at weblogic.webservice.tools.stubgen.StubGen.visit(StubGen.java:78)
at weblogic.webservice.tools.stubgen.ServiceGen.generateStub(ServiceGen.java:250)
at weblogic.webservice.tools.stubgen.ServiceGen.visit(ServiceGen.java:159)
at weblogic.webservice.tools.build.internal.ClientGenImpl.runStubGen(ClientGenImpl.java:610)
at weblogic.webservice.tools.build.internal.ClientGenImpl.generateStub(ClientGenImpl.java:570)
at weblogic.webservice.tools.build.internal.ClientGenImpl.doClientGenFromWsdl(ClientGenImpl.java:409)
at weblogic.webservice.tools.build.internal.ClientGenImpl.run(ClientGenImpl.java:340)
at weblogic.webservice.clientgen.doClientGen(clientgen.java:194)
at weblogic.webservice.clientgen.runBody(clientgen.java:86)
at weblogic.utils.compiler.Tool.run(Tool.java:192)
at weblogic.utils.compiler.Tool.run(Tool.java:147)
at weblogic.webservice.clientgen.main(clientgen.java:213)

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