Web Service Calling Error

[Murali4u]

Hi all,

I have a job to call the web service but i ended up with the below error. Can anyone experienced the same issue? Pls advice.
also is there any possibility to check/verify any particular web service could be called from datastage or not .

Web_Services_Transformer_38,0: Fatal Error: Fatal: 0026`:`com.ascentialsoftware.wsclient.ServiceInvocationException: [b]Service invocation exception[/b]:
at com.ascentialsoftware.wsclient.WebService.callService(WebService.java:1602)
at com.ascentialsoftware.wsclient.WebService.callService(WebService.java:1544)
at com.ascentialsoftware.wspack.Transformer.process(Transformer.java:104)
at com.ascentialsoftware.jds.StageFactory.runStage(StageFactory.java:544)
at com.ascentialsoftware.jds.StageFactory.runTransformer(StageFactory.java:361)
Caused by: java.lang.NullPointerException
at com.ascentialsoftware.wsclient.xml.DerivationParser.match(DerivationParser.java:622)
at com.ascentialsoftware.wsclient.xml.DerivationParser.element(DerivationParser.java:367)
at com.ascentialsoftware.wsclient.xml.DerivationParser.segment(DerivationParser.java:271)
at com.ascentialsoftware.wsclient.xml.DerivationParser.segment(DerivationParser.java:293)
at com.ascentialsoftware.wsclient.xml.DerivationParser.segment(DerivationParser.java:293)
at com.ascentialsoftware.wsclient.xml.DerivationParser.segment(DerivationParser.java:208)
at com.ascentialsoftware.wsclient.xml.DerivationParser.expr(DerivationParser.java:171)
at com.ascentialsoftware.wsclient.xml.DerivationParser.parse(DerivationParser.java:138)
at com.ascentialsoftware.wsclient.xml.TreeBuilder.compileRules(TreeBuilder.java:84)
at com.ascentialsoftware.wsclient.MappingHandler.fromArray(MappingHandler.java:304)
at com.ascentialsoftware.wsclient.InputRequest.buildRequestBodyDocument(InputRequest.java:908)
at com.ascentialsoftware.wsclient.WebService.callServiceInternal(WebService.java:1625)
at com.ascentialsoftware.wsclient.WebService.callService(WebService.java:1591)
... 4 more