I'm using gretl 1.9.3 and the dataset chomage.gdt. I tried to set specific ar lags to 1 4 5 but Gretl added 10 ma terms at lags 1 thru 10 in addition to the ar terms at lags 1 4 5. I couldn't clear the model by clearing the dataset. Also, the first difference spinner was not picked up. I tried specific lags (1 12 13 ma lags) using bjg.gdt and there were problems with that as well. (command has insufficient args) Bob