Hi All, I think enough people have joined to post to this list now.. Quincey will present ticket 273 (immediate non-blocking collective I/O operations) for a first reading at the January meeting. I attached an updated draft for IO chapter authors (or others) to review before sending it out on the general mailing list. Last time there was an issue with deprecating the split collective routines. Let me know if you have any comments. ticket url: https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/273 Thanks, Mohamad