> Apart from waiting for a bugfix I can only advise a workaround: Restart
> gretl and use the command log that gretl records automatically and save
> that as a script. (In the Tools menu.) There you will see the data file
> you loaded ('open') and you will see your FE estimation command
> ('panel'). When you re-run that script you should get your results back.
The workaround worked very well.
Date: Wed, 23 Jan 2019 08:57:13 -0500 (EST)
> Problem found: it's due to the weird way that the Windows C library
> writes nans (Not a Number). A fix will be forthcoming shortly.
Thank you both very much.
Marcelo