The purpose of this command is to let scripts know if they are incorporated into SpecTcl or are running over the ReST command simulation jackets. The command unconditionally returns a status of TCL_OK and a result of 0 indicating the script is not remote.
This script is not enapsulated and, therefore, any rank that executes it executes it locally. A typical use case, has this executed by a GUI running in the MPI_ROOT_RANK.