I have a situation here, i am working with a automobile industry and customer sends us EDI 830's (FSD and JIT schedules). we are using scheduling agreements (Doc type - LZ) to process those schedules. I have couple of parts that we dont manufacture and we ask our vendors to ship it direct to customer. i am trying to set up a third party order processing for this sceanario but system is giving me message that i cant use scheduling agreements. i tested with sales order and it worked fine with that. Is there any way to figure out solution with scheduling agreements. Any help will be appriciated.