VMS Help RUN, Process, Qualifiers, /DETACHED  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /DETACHED
       /NODETACHED

    Creates a detached process with the same user identification code
    (UIC) as the current process. (To create a detached process with
    a different UIC, use the /UIC qualifier.) By default, the created
    process is not a detached process.

    By default, resource quotas for the detached process are limited
    by the quotas of the creator process (maximum) and the system
    parameters PQL_M* (minimum). The IMPERSONATE or CMKRNL privilege
    allows you to specify any quotas for the detached process that
    exceed the normal range. Unless you have the IMPERSONATE or
    CMKRNL privilege, the maximum number of detached processes that
    you can create is limited to the quota defined by MAX_DETACH in
    your UAF.