On Tue, 16 Sep 2008, abdilahi osman hussein wrote: * What platform are you working on? * What sort of LaTeX installation do you have? * What values have you set under gretl's Preferences? That is, under: /Tools/Preferences/General/Programs/Command to compile TeX files If the appropriate executable is not in the PATH on your system, you will have to specify the full path under that Preferences entry, for example (on Windows): c:\somewhere\not\in\path\pdflatex.exe Allin Cottrell