Those are the standard content handlers used by EDIINT module for EDI X12 type.So what content-type they wanted to use in the payload?any custom contenthandler,if so what is the transaction type?
For handling payloads these 3 types are available
application/edi-x12
application/EDIFACT
application/XML
HTH,
RMG
#Integration-Server-and-ESB#webMethods#B2B-Integration