[Gretl-users] GARCH modeling.

Hey all, I'm a new user of gretl and fairly new to econometrics in general so please try not to be too technical. I am using gretl to do some GARCH(1,1) modeling for a data verification project with my Master's Thesis. I have a set of Euro-Dollar exchange data that I am trying out the GARCH modeling on to get to know the software. My problem is that when I attempt to do this, I get an error that reads "Convergence criteria not met" and I have no idea what this means. Could anyone please explain what this is telling me and how I might go about fixing it? Thanks in advance. Mike 'Chips' Estrada Mechanical Engineer Socorro, NM