/sys$common/syshlp/helplib.hlb System Services, $ICC CLOSE ASSOC, Arguments  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 assoc_handle

    OpenVMS usage:association_id
    type:         longword (unsigned)
    access:       read only
    mechanism:    by value
    The handle of the association to be closed.