dio_cancel_all_calc_devices (ul_calc_device)

	status.i4.v = dio_cancel_all_calc_devices()

	This routine cancels all devices from the calculation
	device pool.

	This function returns status values as follows:

	DIO_OK			success
	DIO_MEMFAIL		memory allocation failure
	DIO_NOT_OPEN		no value because of no buffer existed but
				it has been created successfully
	negative value		other ACNET format error
	positive value		number of calculation lists cancelled

	This function requires the following include files:

	ul_calc_device_h:calclib_h, acnet_errors_h

	Related functions:

	dio_can_calc_buffer_list_c, dio_can_calc_buffer_device_c,
	dio_get_calc_buffer_device_c, dio_get_calc_value_c,
	dio_bld_calc_buffer_list_c, dio_get_calc_buffer_list_c

	C/C++ usage:

	int	status;

	status = dio_cancel_all_calc_devices();