web service client gives: String is referenced but not defined error

Question

Hi All,

After I generated client stubs for my web service. I tried to access the web service through the client and during run time it gives the following error...

java.io.IOException: Type {http://myurl_here}String is referenced but not defined.
    at org.apache.axis.client.Service.initService(Service.java:250)
    at org.apache.axis.client.Service.<init>(Service.java:165)
    at org.apache.axis.client.ServiceFactory.createService(ServiceFactory.java:198)
    at com.cisco.ipcentral.service.clients.AbstractSvcClient.<init>(AbstractSvcClient.java:43)
    at com.cisco.ipcentral.service.clients.BUSvcClient.<init>(BUSvcClient.java:23)
    at com.cisco.ipcentral.service.clients.SvcClientsPool.getBUSvcClient(SvcClientsPool.java:94)
    at com.cisco.ipcentral.maven_ipcentral_plugin.AbstractIPCentralMojo.createProject(AbstractIPCentralMojo.java:608)
    at com.cisco.ipcentral.maven_ipcentral_plugin.IPCentralMojo.execute(IPCentralMojo.java:396)
    at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:483)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:678)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:553)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:523)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:371)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:332)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:181)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:356)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:137)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
    at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:41)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:592)
    at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
    at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
    at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
    at org.codehaus.classworlds.Launcher.main(Launcher.java:375)

Please, some one let me know why this error is being thrown at run time. I validated my wsdl and it is a valid one. What does this error mean, I can't make any sense of it.

Thanks, Shiv