lsfile (ul_lssol)

	lsfile(options_vun.i4.r, status.i4.r)

	This routine allows the caller to specify a file containing
	optional parameter values to be used by lssol.  This routine
	must be called before calling lssol.

	options_vun	unit number of the file containing the optional
			parameter values (0-99)
	status		returned status
			(0 -> success,
			 1 -> "options_vun" is out of range,
			 2 -> invalid file format)

	This function requires the following include files:

	ul_lssol_h:lssol_h

	Related functions:

	lssol, lsoptn(_c)

	C usage:

	int	options_vun = 0;
	int	status;

	lsfile(&options_vun,&status);