VMS Help System Services, $SETAST  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Enables or disables the delivery of asynchronous system traps
    (ASTs) for the access mode from which the service call was
    issued.

    Format

      SYS$SETAST  enbflg

    C Prototype

      int sys$setast  (char enbflg);

  Additional Information (explode) :

• Argument