Hello,

I have a panel dataset which is evenly balanced but when I run xtset (or ttset) command to set region and time (year). I get a message that the panel has gaps. Listing the id and time shows that there isn't a gap so I'm not quite sure how to override this message so I can run a ITSA analysis. Please advise, I've never had this happen before?!?
Code:
input long region int year
 1 2006
 1 2007
 1 2008
 1 2009
 1 2010
 1 2011
 1 2012
 1 2013
 1 2014
 1 2015
 1 2016
 2 2006
 2 2007
 2 2008
 2 2009
 2 2010
 2 2011
 2 2012
 2 2013
 2 2014
 2 2015
 2 2016
 3 2006
 3 2007
 3 2008
 3 2009
 3 2010
 3 2011
 3 2012
 3 2013
 3 2014
 3 2015
 3 2016
 4 2006
 4 2007
 4 2008
 4 2009
 4 2010
 4 2011
 4 2012
 4 2013
 4 2014
 4 2015
 4 2016
 5 2006
 5 2007
 5 2008
 5 2009
 5 2010
 5 2011
 5 2012
 5 2013
 5 2014
 5 2015
 5 2016
 7 2006
 7 2007
 7 2008
 7 2009
 7 2010
 7 2011
 7 2012
 7 2013
 7 2014
 7 2015
 7 2016
 8 2006
 8 2007
 8 2008
 8 2009
 8 2010
 8 2011
 8 2012
 8 2013
 8 2014
 8 2015
 8 2016
 9 2006
 9 2007
 9 2008
 9 2010
 9 2011
 9 2012
 9 2013
 9 2014
 9 2015
 9 2016
10 2006
10 2007
10 2008
10 2009
10 2010
10 2011
10 2012
10 2013
10 2014
10 2015
10 2016
11 2006
11 2007
end
label values region region2
label def region2 1 "Chubu", modify
label def region2 2 "Chugoku", modify
label def region2 3 "Fukushima", modify
label def region2 4 "Hokkaido", modify
label def region2 5 "Iwate", modify
label def region2 7 "Kansai", modify
label def region2 8 "Kyushu_Okinawa", modify
label def region2 9 "Miyagi", modify
label def region2 10 "Northern_Kanto_Koshin", modify
label def region2 11 "Shikoku", modify
Code:
xtset region year
       panel variable:  region (unbalanced)
        time variable:  year, 2006 to 2016, but with a gap
                delta:  1 unit