3673459 - Order confirmations for lean service purchase order failed with the error: "[DOC_DISPATCH_ERROR] Dispatch Error -- java.lang.NullPointerException: Cannot invoke "org.w3c.dom.Node.getNodeType()" because "node" is null"

Order confirmations for lean service purchase order failed to reach Cloud Integration Gateway Capability (CIG) with the error message observed: 

[DOC_DISPATCH_ERROR] Dispatch Error -- java.lang.NullPointerException: Cannot invoke "org.w3c.dom.Node.getNodeType()" because "node" is null at ariba.network.util.xml.XMLUtil.getAttribute(XMLUtil.java:1023) at ariba.network.service.common.docprocessor.queuehandlers.ConfirmationEnrichmentHandler.addInformationFromSpendDetailNode(ConfirmationEnrichmentHandler.java:618) at ariba.network.service.common.docprocessor.queuehandlers.ConfirmationEnrichmentHandler.getItemOutInformationMap(ConfirmationEnrichmentHandler.java:253) at ariba.network.service.common.docprocessor.queuehandlers.ConfirmationEnrichmentHandler.getItemOutMap(ConfirmationEnrichmentHandler.java:201) at ariba.network.service.common.docprocessor.queuehandlers.ConfirmationEnrichmentHandler.convertPOInformationToMap(ConfirmationEnrichmentHandler.java:159) at ariba.network.service.common.docprocessor.queuehandlers.ConfirmationEnrichmentHandler.addCustomParamsToXSLT(ConfirmationEnrichmentHandler.java:102) at ariba.network.service.common.docprocessor.queuehandlers.DocumentEnrichmentHandler.getEnrichedDocument(DocumentEnrichmentHandler.java:62) at ariba.network.service.common.docprocessor.queuehandlers.DocumentEnrichmentHandler.enrichDocument(DocumentEnrichmentHandler.java:47) at ariba.network.service.apps.enrichmentdispatcher.EnrichmentDispatcherQueue  

KBA , SBN-AN-TX-OC , Order Confirmation , SBN-AN-TX-POA , Transaction (Purchase Orders, Ship Notices & Goods Receipts) , Problem