Synopsis
		sfweigwf slo=Fslo.rsf < Fsou.rsf coo=Fcoo.rsf > Fwfl.rsf verb=n down=y causal=n

Parameters
		bool causal=n [y/n] causality flag   file coo= auxiliary input file name   bool down=y [y/n] up/down flag   file slo= auxiliary input file name   bool verb=n [y/n] verbosity flag