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

       /ENQUEUE_LIMIT=quota

    Specifies the maximum number of locks that a process can have
    outstanding at any one time.

    The default quota is that established at system generation time.
    The minimum required for any process to operate is 2.