GPCLEAR clears the current graphics device.


INPUT PARAMETERS
 
    DEVICE    *Graphics device
 
 
PROGRAM DESCRIPTION
 
    This program clears the graphics device.  On an interactive
    device, the screen is erased.  On a hardcopy device, the
    next plot will be on a new page.


ERROR MESSAGES
 
    [GPCLEAR  -1]   Fatal error initializing TAE.
    [GPCLEAR  -2]   Fatal error reading TAE parameters.
    [GPCLEAR  -3]   Fatal error initializing GEMPLT.