As of MPI 2.2 there is no longer a restriction against read access to a live send buffer. The wording was changed to now prohibit the user to "modify". You can look the subsection of Communication Modes in chapter 3 but you will need to compare MPI 2.1 and 2.2 carefully to see the change.
The change was done by the MPI Forum under Ticket 45. Dick Treumann - MPI Team IBM Systems & Technology Group Dept X2ZA / MS P963 -- 2455 South Road -- Poughkeepsie, NY 12601 Tele (845) 433-7846 Fax (845) 433-8363
