The MPI Standard specifies a mechanism for installing one's own error handler, and specifies the behavior of two predefined ones, MPI_ERRORS_RETURN and MPI_ERRORS_ARE_FATAL. As part of the mpe library, we include two other error handlers, to facilitate the use of dbx in debugging MPI programs.
MPE_Errors_call_dbx_in_xterm
MPE_Signals_call_debugger
These error handlers are found in the mpe directory.