status.i4.v = bpm_set_save_file(file_name.i1a.r)

	This routine sets the active BPM data save file.  This overrides
	the default file set by the most recent call to bpm_machine_c.

	file_name	ASCII file name (null-terminated)

	This function returns ACNET status values as follows:

	OK			success
	CBS_NO_SUCH		file does not exist

	This function requires the following include files:


	Related functions:

	bpm_machine_c, bpm_get_save_file, bpm_get_default_save_file,
	bpm_master_file_menu_c, bpm_save_data, bpm_file_menu_c,
	bpm_directory_info, bpm_protect_file_c, bpm_rename_file_c,
	bpm_link_file_c, bpm_unlink_file_c, bpm_file_link_info_c,
	bpm_next_unlinked_file_c, bpm_find_oldest_file_number_c,
	bpm_get_data_c, blm_get_data_c, bpm_get_intensity_c

	C/C++ usage:

	static const char	file_name[] = "Main Injector";
	int	status;

	status = bpm_set_save_file(file_name);