VMS Help TCPIP Services, Programming Interfaces, RPC Server Routines, svcerr_weakauth, Description  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Called by a service dispatch routine that refuses to perform
    a remote procedure call due to insufficient (but correct)
    authentication parameters. The routine calls svcerr_auth (xprt,
    AUTH_TOOWEAK).