Arvola, It was not the intent to require use of the syncReplyMode attribute (and hence the Via). The two parties exchanging messages point-to-point are assumed to know by virtue of their CPA (or the virtual equivalent of one) what their syncReplyMode is. The Via element needs this because the intermediaries don't have access to this information. Cheers, Chris Arvola Chan wrote: > > David: > > I don't think using a second DeliveryChannel will work. The following is an > excerpt from the CPP/A spec: > > The ebXML Message Service's syncReply attribute is set to a value of true > whenever the 1190 > syncReplyMode attribute has a value other than none . 1191 > > Even if you have a channel that calls for the use of synchronous reply mode, > the syncReply attribute still has to be set. In other words, it is still > necessary to use the Via element if the syncReply attribute is present only > there, but this constradicts the assumption that the Via element is only > used when intermediaries are involved. > > -Arvola > >