Graphics Driver
If when plotting in Maple you receive an empty plot with no axis it is likely that your graphics driver needs to be updated. You can update your display driver from Device Manager in Windows or from the vendors website.
Hardware Acceleration and Plot Anti-Aliasing
If updating your graphics driver doesn't solve the problem then it's possible that by toggling the anti-aliasing and hardware acceleration settings will allow you to view your plot.
Error Messages
If you receive the error:
Warning, unable to evaluate the function to numeric values in the region; complex values were detected
Then your plot likely contains complex values. You can try plotting just the real part of the plot by using Re(). More suggestions on this error are available from the error message link.
If you receive an error similar to:
Warning, expecting only range variable x in expression x+y to be plotted but found name y
then it is possible that you either have an undefined variable in your plot or are attempting to plot a 3D plot in 2D.
If none of the above solve the issue please contact support@maplesoft.com with a copy of the worksheet that causes the empty plot.