I guess you need to debatch the message per ORDER. You can do that using flat file dissassembler component in pipeline.
Once you generate the schema using flat file wizard, change the “Max Occurs” property of ORDER node to 1. Then use a receive pipeline component, drag a flat file dissassembler component and use the above schema in the “Document Schema” property. Then use the above receive pipeline to receive the flat file message.
Hope it helps…
SK