How to combine multiple original files to generate a scz file

I need to combine multiple original files into a scene, and then generate a scz file from this scene. How do I implement this function?

When you say:

Does this mean that the source CAD files are not supported via Exchange through converter/libconverter and so you are using Authoring/libsc?

The original file supports Exchange and libconvert conversion, but I need to merge multiple original files to generate one scz file. How can I use Exchange to achieve this?

In Exchange, it is possible to combine multiple models as described in this forum post:

Now, once combined, you can generate a PRC and from that, you can generate a single SCZ file.