Many thanks for the suggestion Acer, Sorry not to have replied earlier, somehow I missed my thread update. Results of your suggestion: eval(plot); proc( p::{set, array, list, rtable, algebraic, procedure, And(`module`, appliable) }, {axiscoordinates::anything := NULL, coords::anything := NULL, ispolarplot::boolean := false}) ... end; > plot(2*x-9, x = -10 .. 10); This was with 2D Input > plot(2.*x-9, x = -10 .. 10); This was with Maple Input > int(sin(x), x); This was with 2D Input -cos(x) > int(sin(x), x); This was with Maple Input -cos(x) > I have not had problems with any other commands that I have tried. Roger

Many thanks for the suggestion Acer, Sorry not to have replied earlier, somehow I missed my thread update. Results of your suggestion: eval(plot); proc( p::{set, array, list, rtable, algebraic, procedure, And(`module`, appliable) }, {axiscoordinates::anything := NULL, coords::anything := NULL, ispolarplot::boolean := false}) ... end; > plot(2*x-9, x = -10 .. 10); This was with 2D Input > plot(2.*x-9, x = -10 .. 10); This was with Maple Input > int(sin(x), x); This was with 2D Input -cos(x) > int(sin(x), x); This was with Maple Input -cos(x) > I have not had problems with any other commands that I have tried. Roger

Thanks for your reply. I tried new worksheets in both document and worksheet mode but still no plot. In worksheet mode, typing 2*x -9 then selecting Plots->2-D Plot produced the line: smartplot(2*x-9); I even tried reinstalling Maple 12, in case the installation has somehow got messed up, but plotting still failed. With Plot Builder in worksheet mode, as before, Preview produces a plot but, selecting Plot just produces: plot(2*x-9, x = -10 .. 10); I also tried the Example file Calculus 1: Tangents, Inverses, and Sampling On opening this worksheet, many plots were displayed. However, on running the worksheet, all the plots disappeared except for those in the Plot Windows of tutor panels. Is it possible to do some sort of debugging on this problem? Roger

Thanks for your reply. I tried new worksheets in both document and worksheet mode but still no plot. In worksheet mode, typing 2*x -9 then selecting Plots->2-D Plot produced the line: smartplot(2*x-9); I even tried reinstalling Maple 12, in case the installation has somehow got messed up, but plotting still failed. With Plot Builder in worksheet mode, as before, Preview produces a plot but, selecting Plot just produces: plot(2*x-9, x = -10 .. 10); I also tried the Example file Calculus 1: Tangents, Inverses, and Sampling On opening this worksheet, many plots were displayed. However, on running the worksheet, all the plots disappeared except for those in the Plot Windows of tutor panels. Is it possible to do some sort of debugging on this problem? Roger