IDoc serialization

Hello all,

When webMethods receive IDocs from SAP through the SAP adapter, IDocs are not always receive in the same sequence as they we’re created in SAP. Do someone knows how we can assure that IDoc are received in the correct order ? In the “GEAR 6.5 SAP Integration Implementation Guide.pdf” file, I read this at page 10:

but I don’t know how I can set up this.

Thank you for your response,