Stop the graphics error messages
It's not uncommon for Graphic command such as Plot to produce a series of annoying error messages. This typically happens when one makes a typo as in the next cell.
Plot and several other graphic functions will no longer do this if you evaluate the cell below.
You can include the code above in your (init.m) file and Mathematica will automatically turn off these messages when the kernel is launched.
Created by Mathematica (May 16, 2004)