Hello,
I am trying to mesh an assembly with four parts in hyperworks. The model is imported as parts and individually tetrameshed. However, after I ran the optistruct analysis, I realized that the three parts at the bottom had merged into one union. Does anyone know what might be causing the problem? Should I import the geometry as an assembly instead of parts? What would be a good workflow in terms of meshing parts in an assembly?
I have attached screenshots of the problem. Thanks in advance!!

