Gnuplot and Octave giving scrollbar error

Question

The following error is occurring in both Gnuplot and Octave at the newest installation:

error: invalid string constant "murrine-scrollbar", expected valid string constant

I have no idea how to proceed.

Answer 1

This error can be solved by changing line 30 in /usr/share/themes/Ambiance/gtk-2.0/apps/mate-panel.rc as shown below. Open the terminal and type:

sudo -i  
cd /usr/share/themes/Ambiance/gtk-2.0/apps  
cp mate-panel.rc mate-panel.rc.bak # backup mate-panel.rc file before editing it  
nano mate-panel.rc

Now mate-panel will be open for editing in nano text editor. Scroll down with the ↓ key and change the following line:

class "GtkScrollbar"              style "murrine-scrollbar" 

by replacing the string "murrine-scrollbar" with "scrollbar" so that it looks like this:

class "GtkScrollbar"              style "scrollbar"  

Press the keyboard combination Ctrl+O and after that press Enter to save the changes in mate-panel.rc. Press the keyboard combination Ctrl+X to exit nano.

Logout in the terminal from root back to normal user.

exit 

Now you will be able to use gnuplot and Octave without getting an error message that says: error: invalid string constant "murrine-scrollbar", expected valid string constant