Como identificar e corrigir erros ao consumir um serviço web SOAP no Android usando ksoap2

Aqui está o serviço web que estou utilizando.

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:glob="http://sap.com/xi/SAPGlobal20/Global">
    <soapenv:Header/>
    <soapenv:Body>
        <glob:SiteLogisticsTaskByElementsQuery_sync>
            <SiteLogisticsTaskSelectionByElements>
                <SelectionBySiteLogisticsTaskID>
                    <InclusionExclusionCode>I</InclusionExclusionCode>
                    <IntervalBoundaryTypeCode>1</IntervalBoundaryTypeCode>
                    <LowerBoundarySiteLogisticsTaskID>904</LowerBoundarySiteLogisticsTaskID>
                </SelectionBySiteLogisticsTaskID>
            </SiteLogisticsTaskSelectionByElements>
            <ProcessingConditions>
                <QueryHitsMaximumNumberValue>10</QueryHitsMaximumNumberValue>
                <QueryHitsUnlimitedIndicator>true</QueryHitsUnlimitedIndicator>
            </ProcessingConditions>
        </glob:SiteLogisticsTaskByElementsQuery_sync>
    </soapenv:Body>
</soapenv:Envelope>'