Dear All, I generated the mesh below in Gmsh by generating three volumes and defining them as a single physical volume. Then I tried to convert it to .xml by using MeshConvert, it did but I got the following messages. After that by using this .xml file I tried to convert it to .vtu file in XmlToVtk executer. However, I got warning messages like below and the following mesh in Paraview . Moreover when I tried to open the .dat file by using XmlToTecplot, Tecplot says "Aspect ratio exceeds ratio limit. The ratio has been just adjusted." and "Axis Mode has been reset to be XYDependent" and got the following view. Do you know how can I solve this problem? I'm sending the .msh and .xml files in the attachment. Regards, Kamil