Library /sys$common/syshlp/helplib.hlb  —  System Services, $DASSGN
    Deassigns (releases) an I/O channel previously acquired using the
    Assign I/O Channel ($ASSIGN) service.

    Format

      SYS$DASSGN  chan

    C Prototype

      int sys$dassgn  (unsigned short int chan);
Additional Information: explode extract
Argument
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