status.i4.v = dio_ssdn_to_snapshot_class_c(ssdns.i1a.r, nodes.i4a.r,

	This routine returns the snapshot class for a device or a list of
	devices based upon their SSDNs.

	ssdns		SubSystem Device Number (SSDN) or array of SSDNs
	nodes		ACNET node or array of ACNET nodes
			(constants are in 'nodedefs')
	properties	property index or array of indices
			(If the first value is less than zero, all devices
			 will be requested with a property index which is
			 equal to the absolute value of this argument.)
			(constants are in 'dbprops')
	num_devices	number of devices
	errors		returned error status or array of errors
	[snap_classes]	returned snapshot class code(s) (constants are in 'ftp')
			(default is NULL)

	This function returns ACNET status values as follows:

	OK			success
	DIO_MEMFAIL		memory allocation failure
	negative value		ACNET format error indicating overall failure
	positive value		number of devices in error indicating partial

	This function requires the following include files:

	diolib_h, nodedefs_h, ftp_h, acnet_errors_h

	Related functions:

	dio_get_snapshot_class_c, dio_can_snapshot_c,
	dio_can_read_using_snapshot_c, dio_can_trigger_snapshot_c,
	dio_snapshot_class_info_c, dio_build_snapshot_list_c,
	dio_get_snapshot_list_c, dio_get_raw_snapshot_list_c,
	dio_cancel_snapshot_list_c, dio_rearm_snapshot_list_c,
	dio_can_read_using_ftp_c, dio_can_ftp_c,
	dio_ftp_class_info_c, sr_sda_get_snapshot_list_c,
	sr_sda_get_raw_snapshot_list_c, error_in_list(_c)

	C/C++ usage:

	char	ssdns[NUM_DEVICES][LEN_SSDN];
	static const short	properties[NUM_DEVICES] = {PRREAD, PRREAD};
	short	errors[NUM_DEVICES];
	int	status;
	static const int	nodes[NUM_DEVICES] = {MI, PBAR};
	int	num_devices = NUM_DEVICES;
	int	snap_classes[NUM_DEVICES];

	status = dio_ssdn_to_snapshot_class_c(ssdns,nodes,properties,