status.i4.v = tlg_init_c([source.e.v])

	This routine initializes TLG information for faster access in
	future tlg_xxx calls.

	[source]	desired source for the timeline data
			(TlgUti::Oper -> active timeline front end (default),
			 TlgUti::Test -> test timeline front end)

	This function returns ACNET status values as follows:

	OK			success

	This function requires the following include files:

	tlguti_h, acnet_errors_h

	Related functions:

	tlg_min_cycle_length_c, tlg_cycle_length, tlg_supercycle_length,
	tlg_event_times_c, tlg_get_reset_info_c, tlg_max_cycle_length_c,

	C/C++ usage:

	tlg_t	source = TlgUti::Oper;

	int status = tlg_init_c(source);