Hi all, Arpad discovered a problem in the current version of the toolkit, where time points are repeated in the input impulse response. This doesn't affect the simulation results (for reasons that are explained in the updated toolkit), but we updated the toolkit anyway. The new toolkit is available from the IBIS-ATM website. Todd. Todd Westerhoff VP, Software Products SiSoft 6 Clock Tower Place, Suite 250 Maynard, MA 01754 (978) 461-0449 x24 twesterh@xxxxxxxxxx www.sisoft.com