Hello, Last night's MTT runs show a fairly consistent segfault on the trunk (1.4a1r20525) in the MPI_Op_free routine, and shows up in various tests (including the IBM test suite's collective/op test): http://www.open-mpi.org/mtt/index.php?do_redir=953
I've not investigated in detail, so it could be a coincidence... but it sure seems like it was caused by either/both of these changes to the "op" stuff yesterday: r20521 and/or r20522 -- Tim Mattox, Ph.D. - http://homepage.mac.com/tmattox/ tmat...@gmail.com || timat...@open-mpi.org I'm a bright... http://www.the-brights.net/