Hi , all: I am the beginner for Grads. I try the sample case model.grb, model.ctl, model.gmp in Tutorial. When I open model.ctl, it shows Time values set: 1987:1:2:0 1987:1:2:0. How can I make time values change to loop in time and show the animation in time series? I have tried sevel commands option in gribmap, such as -t0, -fhr. But it does not work yet. Thanks! wenting