run (also the name of the folder in which the solution is stored)
$ should be 5 letter long
EXMP5

$ (2) the name of the topography file used (if the name is Nil topo is assume to be flat)
$     Otherwise the file should contain nx by ny points (see below) defining the topography in meters
$     Note that the evolution of this topography (in amplitude and offset) will be allowed to
$     change through time
$     If the name of the file ends with a slash "/", then Pecube will assume it is a directory
$     