Thank you for reply. After I updated packages as you said, the same error message appeared. I have installed RGtk2 and RGtk Extras. Is there additional GTK I need? -- View this message in context: http://r.789695.n4.nabble.com/Unable-to-start-with-package-rattle-tp4661881p4661885.html Sent from the R help mailing list archive at Nabble.com.