VMS Help  —  RTL Routines, LIB$  LIB$FREE_LUN
    The Free Logical Unit Number routine releases a logical unit
    number allocated by LIB$GET_LUN to the pool of available numbers.
    LIB$FREE_LUN is the complement of LIB$GET_LUN.

    Format

      LIB$FREE_LUN  logical-unit-number
Additional Information: explode extract
Returns Argument
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