status.i4.v = ntv_cancel_request(request_id.u2.r)

	Cancel an outstanding request (usually a multiple-reply

	request_id	word containing the request identification code of the
			request to be cancelled.

	status	 VMS completion condition code.

	This function returns status values as follows:

	SS__WASCLR	success, the request has been cancelled
	SS__WASSET	success, the request is already marked for delete.
	SS__ACCVIO	no address of request identification word given
	SS__INSFARG	insufficient number of arguments
	NET__NOSUCHREQ	no such request as given by the request id or
			request not owned by this process
	NET__NOTBLKOWN	not owner of the request control block
	NET__NOTREQID	not identification code for a request

	This function requires the following include files:

	acnet_h, ssdef_h

	Related functions: