IBSTOP

Board-Level/Device-Level

---

Purpose

Abort asynchronous I/O operation.

Format

C

unsigned long ibstop (int ud)

Visual Basic

CALL ibstop (ud%)

or

status% = ilstop (ud%)

Interactive Control (Usage Notes)

ibstop

Input

ud	Board or device descriptor

Output

Function Return

The value of Ibsta

Description

The ibstop function aborts any asynchronous read, write, or command operation that is in progress and resynchronizes the application with the driver. If asynchronous I/O is in progress, the error bit is set in the status word, Ibsta, and EABO is returned, indicating that the I/O was successfully stopped.

Possible Errors

EABO	Asynchronous I/O was successfully stopped.
EDVR	The NI-488.2 driver is either configured incorrectly or is not properly installed.
EHDL	ud is invalid or out of range.
ELCK	The requested operation could not be performed because of an existing lock by another process.
ENEB	The interface is not installed or is not properly configured.