bigGP.exit terminates the package's execution environment and
detaches the package. After that, you can still work in R.bigGP.quit terminates the package's execution environment and quits R.
bigGP.exit()
bigGP.quit(save = "no")mpi.exit or mpi.quit. If leaving R altogether, one simply uses bigGP.quit.
mpi.exit
mpi.quit