Am 08.12.2015 um 15:33 schrieb Raul Gimeno:
 Hello
 
  
 
 I opened a previously saved session. When I estimate the model with OLS
 the estimation is done for a subset of the full range of data. Despite
 the fact that I tell gretl to take the full range through the menu
 “Sample”  the estimation is always done with a subset of the data
 available.I’ve been doing it a couple of time and I always get the
 estimation for the same subset of data.  I don’t know why. 
Hi,
sounds like some initial values needed for lags, but without more
details it's impossible to tell.
cheers,
sven