SOAP Error

hello all I am receiving the follow error when doing a webservice call.

[FONT=Arial][SIZE=2][COLOR=#0000ff][FONT=Arial][SIZE=2][COLOR=#0000ff][FONT=Arial][SIZE=2][COLOR=#0000ff]An error occurred while tracing.
com.wm.app.b2b.server.ServiceException: [ISS.0088.9139] Output parameters do not conform to targetOutputSignature:
errorCode=VV-002
pathName=/tns:TrackPackagesByPinResponse/tns:TrackingInformationList/tns:TrackingInformation[0]/tns:Scans/tns:Scan[1]/tns:ScanDetails
errorMessage=[ISC.0082.9026] Undefined Object found
errorCode=VV-002
pathName=/tns:TrackPackagesByPinResponse/tns:TrackingInformationList/tns:TrackingInformation[0]/tns:Scans/tns:Scan[2]/tns:ScanDetails
errorMessage=[ISC.0082.9026] Undefined Object found
errorCode=VV-002
pathName=/tns:TrackPackagesByPinResponse/tns:TrackingInformationList/tns:TrackingInformation[0]/tns:Scans/tns:Scan[3]/tns:ScanDetails
errorMessage=[ISC.0082.9026] Undefined Object found
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IDEAS?
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[FONT=Arial][SIZE=2][COLOR=#0000ff][FONT=Arial][SIZE=2][COLOR=#0000ff]Check errorCode which is missing while your getting SOAP response back

[FONT=Arial][SIZE=2]-Shaik [/size][/font][/COLOR][/SIZE][/FONT][/COLOR][/SIZE][/FONT]