Hi Thiago, <div><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">please post a <a href="http://www.vtk.org/Wiki/VTK/MinimalExample">minimal example</a> that produces mentioned error.</span><br>
</div><div><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)"><br></span></div><div><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">j.</span></div>