The REPLACE command checks in a version of an element that you
    previously checked out with the RESERVE command.

    You must have a context set to issue the REPLACE command.

    The REPLACE command converts the ghost copy reserved to your
    context into a new version stored in a base partition. This new
    version is accessible to anyone whose context is set to that base
    partition. To create subsequent versions of a controlled element,
    use the RESERVE and REPLACE commands, rather than the DEFINE
    command.

    An error occurs if you issue the /BRANCH qualifier with a branch
    name already in use.

    If you issue the REPLACE command with branch information
    specified in the element name, do not include a /CLOSURE
    qualifier. The /CLOSURE qualifier will add this branch name to
    the name of every element you replace.

    If you are issuing the REPLACE command in a distributed
    environment, you must issue the REMOVE command after issuing
    the RESERVE command.

    If you decide to discard the changes you have made to your
    working copy, use the UNRESERVE command to cancel your
    reservation and destroy your copy.

    If you decide to merge a branch line that you have created back
    into the main line of descent, use the MERGE command.