Hello, I have an tcltk application that runs without problems in R1.9.1, but when I press the "run"-button in R2.0.1, I get the message "Error in function () : can't change value of a locked binding". I have another tcltk application that runs fine on R2.0.1, so tcltk seems to be properly installed. Does anyone have a good idea? The code is available at ftp.imr.no/vidarh/diva.zip Best regards, Vidar Hjellvik Institute of Marine Research P.O.Box 1870 Nordnes N-5817 Bergen phone: +47 55 23 86 62 email: vidarh@imr.no