status.i4.v = bpm_unlink_file_c(file_number.i4.v)

	This routine unlinks the BPM file specified by the file number
	argument from another file.  This link would have been created
	by an earlier call to bpm_link_file_c.  The master file used
	is the last one set by a call to bpm_set_save_file or set by
	default by bpm_machine_c.

	file_number	number of file to unlink
			(starts at 1)

	This function returns ACNET status values as follows:

	OK			success
	CBS_INVARG		invalid file number or file specification passed
	CBS_NO_SUCH		requested file doesn't exist
	SQL_xxx			database error

	This function requires the following include files:

	ul_cbsaux/bpmuti.h, acnet_errors_h

	Related functions:

	bpm_link_file_c, bpm_file_link_info_c, bpm_next_unlinked_file_c,
	bpm_find_oldest_file_number_c, bpm_machine_c, bpm_get_save_file,
	bpm_get_default_save_file, bpm_set_save_file, bpm_rename_file_c,
	bpm_protect_file_c, bpm_file_menu_c, bpm_directory_info

	C/C++ usage:

	int		status;
	int		file_number = FILE_NUMBER;

	status = bpm_unlink_file_c(file_number);