Hello, I want to signal an error in the website documentation. In this URL : https://www.mpich.org/static/docs/v3.2/www3/MPI_Igather.html *recvcount *number of elements in receive buffer (significant only at root) (non-negative integer) should be : *recvcount *number of elements for any single receive (integer, significant only at root We can see this page 200 of the MPI standard, June 4, 2015. Hugo T. _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss