The following new error classes are defined
| MPI_ERR_WIN | invalid win argument |
| MPI_ERR_BASE | invalid base argument |
| MPI_ERR_SIZE | invalid size argument |
| MPI_ERR_DISP | invalid disp argument |
| MPI_ERR_LOCKTYPE | invalid locktype argument |
| MPI_ERR_ASSERT | invalid assert argument |
| MPI_ERR_RMA_CONFLICT | conflicting accesses to window |
| MPI_ERR_RMA_SYNC | wrong synchronization of RMA calls |