[Gretl-users] gnuplot shaded areas

Hi all, I trying to plot a matrix where the last two columns contain information on confidence intervals which I would like to plot as a shaded area. I wrote a script, but the pdf is not properly compiled giving me an error msg which I don't fully understand. I attached a script which requires the matrix to plot and the path where to store the pdf as inputs. Unfortunately I can't figure out where the error is. Thanks for your help in advance. Best, Artur