Hi all, I have added a clarification to the point-to-point chapter (where MPI_REQUEST_FREE is defined) to state that collective requests must not be freed while they are active. I have pushed these changes to Github and produced a new PDF of the MPI Standard (attached to comments on both the issue and the pull request). I have added a comment in Github (on both the issue and the pull request) summarising the current thinking regarding “collective free” semantics and “block until really deallocated” semantics. Useful links: https://github.com/mpi-forum/mpi-issues/issues/25 https://github.com/mpi-forum/mpi-standard/pull/29 https://github.com/mpi-forum/mpi-standard/files/1483740/mpi32-report.pdf I think this means we are ready for the next face-to-face MPI Forum meeting. We made quite a few small changes since the version announced for the last meeting. We should re-read the whole proposal, rather than try to get away with a “no no vote” followed by a 1st vote. If there are other tasks to complete before we announce our reading (deadline Monday 20th Nov), please let me know by replying to this email list ASAP. Cheers, Dan. The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.