> When I estimate a (highly correlated) bivariate model (providing the --robust and --cluster options) throught the GUI and try to save the $yhat matrix through the console, I got the same (not so) error message:

>> The statistic you requested is not available

>>>> genr series predict_external = $yhat[,1]

> Instead, when I estimate the model through the console (or script) everything works fine

> ???

> Hold on, a second, let me get this straight: unless I'm mistaken, you're

> estimating a model through the GUI and then try to acces its $yhat via

> console, is that right?

Absolutely right!

> Well, you can't do that.

Ops, I used to know gretl holds "in memory" the $-statistics from the last model estimated :(

> What you can do is: from the GUI, save the model

> as an icon (let's say you call it "moo"), and then you can access $yhat

> via the "moo.$yhat" syntax.

It works pretty fine.

Many thanks,

Artur