We are exploring different options for dealing with the fact that XI will choke on very large messages/files. One of the options that we are considering is a third party tool that bypasses XI. However, we've just learned that it may be possible to solve the large message problem by using ABAP Mapping, because supposedly, by doing so, one would bypass the large message being converted to XML as it comes into XI. The scenario involves messages coming into XI on their way to SAP R/3. Does the ABAP Mapping option appear to be viable to you experienced folks out there?