Dear Allin, I have a panel data and try to run the following script: /loop for i=1..6 smpl region = i --restrict --replace gnuplot sonede gr --output="display" endloop/ but no graph is produced. Instead, when I enter the loop commands via gretl's console, things work beautifully. Well, if I precede the loop with the "smpl --full" command and run the script _*as a whole*_, it does work fine: I got the plots. Otherwise, if I run first the "smpl --full" command , followed by the loop, graphs are still missing and not produced on the screen. It's something going wrong there? cheers, artur -- ********************************** Artur BALA Development Economist, Consultant email: artur.bala.tn(a)gmail.com phone: +216 24 71 00 80 skype: artur.bala.tn **********************************