Problem on converting Rigid body of template model to flexible motion view

Hello Altair support team,

I’m having a difficulty transforming the lower control arm (or any other part) of MacPherson (or any suspension) template in motion view from rigid to flexible model for FEM analysis. I exported the data using load export method as .dat format and when I try convert it to h3d format using flex prep it flags an error ‘’node number does not exist”. I tried different node numbers but the result is the same. I’m using Hyperworks v14.