Hi,
one of my colleagues discovered a new bug in Gretl (official 1.6.0) in 
Windows, and I can see that the same thing occurs in Linux:
1- Open a time series dataset (for example data3-6)
2- Estimate an ARIMA model for one of the variables.
3- In the model window, select "File/save to session as icon" 
4- In the main window, go to "session files" and click on "save session
as" 
and write a name.
5- Close Gretl.
6- Open Gretl again, 
7- select "File/session files/" 
8- open the previously saved session, and 
9- double-click on "Model 1", then --> ¡¡ gretl exits !!
-- 
Ignacio Díaz-Emparanza
Dpto. de Economía Aplicada III (Econometría y Estadística)
UPV-EHU