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java.lang.ClassCastException: 	at weblogic.xml.schema.binding.internal.XSDTypeMapping.addOptionalEntries(XSDTypeMapping.java:674)	at weblogic.xml.schema.binding.internal.XSDTypeMapping.createOptionalMapping(XSDTypeMapping.java:628)	at weblogic.xml.schema.binding.internal.XSDTypeMapping.createPrimaryMapping(XSDTypeMapping.java:618)	at weblogic.xml.schema.binding.internal.XSDTypeMapping.createInstance(XSDTypeMapping.java:135)	at weblogic.xml.schema.binding.internal.XSDTypeMapping.(XSDTypeMapping.java:116)	at weblogic.xml.schema.binding.internal.XSDTypeMappingBuilder.initTypeMapping(XSDTypeMappingBuilder.java:57)	at weblogic.xml.schema.binding.internal.TypeMappingBuilderBase.(TypeMappingBuilderBase.java:77)	at weblogic.xml.schema.binding.internal.XSDTypeMappingBuilder.(XSDTypeMappingBuilder.java:74)	at weblogic.xml.schema.binding.internal.TypeMappingBuilderFactoryBase.createTypeMappingBuilder(TypeMappingBuilderFactoryBase.java:18)	at weblogic.ant.taskdefs.webservices.autotype.AutoTyper.createTypeMappingBuilder(AutoTyper.java:230)	at weblogic.ant.taskdefs.webservices.autotype.AutoTyper.(AutoTyper.java:89)	at weblogic.ant.taskdefs.webservices.autotype.WSDLAutoTyper.(WSDLAutoTyper.java:50)	at weblogic.ant.taskdefs.webservices.clientgen.WSDLClientGen.(WSDLClientGen.java:85)	at weblogic.ant.taskdefs.webservices.clientgen.ClientGenTask.execute(ClientGenTask.java:226)	at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)	at org.apache.tools.ant.Task.perform(Task.java:364)	at org.apache.tools.ant.Target.execute(Target.java:341)	at org.apache.tools.ant.Target.performTasks(Target.java:369)	at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1216)	at org.apache.tools.ant.Project.executeTarget(Project.java:1185)	at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:40)	at org.eclipse.ant.internal.ui.antsupport.EclipseDefaultExecutor.executeTargets(EclipseDefaultExecutor.java:32)	at org.apache.tools.ant.Project.executeTargets(Project.java:1068)	at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.run(InternalAntRunner.java:423)	at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.main(InternalAntRunner.java:137)