script error (makeOPENMPI, v1806)

hi developer!

In $FOAM_ETC/bashrc, i changed L85 from 'SYSTEMOPENMPI' to 'OPENMPI'.

run the script makeOPENMPI but my term said the below

./makeOPENMPI: 60: /home/sariew9/OpenFOAM/OpenFOAM-v1806/etc/config.sh/mpi: _foamEtc: not found

What is the problem?

(under the ubuntu14.04LTS)