The conversion utility of Ansys Polydata does not modify the HYPERMESH element or node numbering. Since element and node numbering for Ansys Polyflow Classic must start at one and must be continuous, ensure to number the elements and nodes in this way in HYPERMESH.
Ansys Polydata will detect and report some numbering errors during the conversion, but the other errors will only be detected by Ansys Polyflow Classic. Verify that the number of elements and nodes reported after the conversion by Ansys Polydata is identical to the number of elements and nodes reported in the TOPO section of the Ansys Polyflow Classic listing file (described in Contents of a Sample Listing File).
Note:  Ensure that the number of Ele and
                        Vert reported by Ansys Polydata after the conversion
                    matches the number of bricks and nodes reported for the root mesh in the
                        TOPO section.
By default, Ansys Polyflow Classic will optimize the element numbering, which affects
                    the CPU time required for the calculation, before it begins the calculation. If
                    you prefer to perform the optimization yourself in HYPERMESH, and have
                    Ansys Polyflow Classic use that optimization instead of optimizing the mesh itself, then
                    start Ansys Polyflow Classic with the -opt msh command line
                    option, as described in Using Optimized or Decomposed Mesh. If you perform the optimization in HYPERMESH (if
                    any), use a method of element renumbering that minimizes average wavefront to
                    reduce the CPU time of your simulation, and that minimizes the maximum wavefront
                    to reduce the memory requirements.