vtkloadS("mymesh.vtk")

Possibly the vtkloadS is boggus but I don’t not,

this peace of code build a vtk file

load "iovtk"
load "msh3"
meshS Th=square3(10,10);
savevtk("Th.vtk",Th,bin=0);
meshS ThS=vtkloadS("Th.vtk");// “mymesh.vtk”);