So, let me get this straight, you are aware that IS 6.1 (and IS 6.5 for that matter) do not support Soap With Attachment (SWA), (nor Soap with MIME / DIME nor MTOM for that matter) but you are wondering why you get a soap fault when you try to use Soap With Attachment?
I’m not sure, I can help you further. Not supported means, well, not supported. The only way I know to support SWA in IS 6.x is to embed a Glue server and use Glue.
IS 7.1 will support (finally) SWA and MTOM without the need for Glue.
Mark
#soa#API-Management#webMethods