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.