OK, you are trying to bring in architectural models.

I loaded the Old Industrial Office Room from DAZ with iRay materials into DAZ Studio, and saved it as a scene. I then loaded it into Poser using the D3D DSON Loader script, and it loaded in seconds. The only issues are that in preview some walls are not visible in Preview (uncheck Remove Backfacing Polys in the preview render settings to fix), and the glass is not transparent...

I'm don't know why you are having issues with DAZ Studio crashing, as it is pretty stable on my machine...

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