******************* This email originates from outside Imperial. Do not click on links and attachments unless you recognise the sender. If you trust the sender, add them to your safe senders list https://spam.ic.ac.uk/SpamConsole/Senders.aspx to disable email stamping for this address. ******************* Hi, Hope everybody is having a nice summer vacation. But the simulations must go on! I am running a quasi-3D simulation. In my test case I have a tetra 2D mesh and 8 Fourier planes. So the elements are triangular prisms. As discussed in many earlier posts, use of equispacedoutput normally decreases the output file size. However, when I use equispacedoutput it not only interpolates my 2D mesh, but also creates triangles in z-direction. Thus, the final output is not comprised of triangular prisms but tetrahedrons. Although decreasing the file size of the 2D mesh, this increases the total file size, because I basically have double the amount of elements along z-direction compared to prior. With the hope to solve this problem, I tried tetonly flag. I am unsure if this is the correct option to use. I get the attached error message, when I run FieldConvert with this option: FieldConvert -f -v -m equispacedoutput:tetonly timeSteps/out.xml timeSteps/out_3.chk/ timeSteps/fcFiles/out_3.plt Here out.xml is my mesh, out_3.chk is the time step I want to convert, and out_3.plt is the name of the output. I know that FieldConvert fails specifically when I use tetonly, as it works when I don't use it. I would very much appreciate any help to solve this problem or a suggestion for a workaround. Thank you in advance for your help. With kind regards, Ilteber -- İlteber R. Özdemir