Michael,

I went ahead and saved the drawing in CAD as a PDF but still it failed. I think this may be because the dxf original I opened came from a graphics program. At least the PDF, when opened in MoI, did not have those nodes on nodes errors. So, it seems that you are saying to leave that step out, i.e. to open the drawing in CorelDraw, clean it up and save it straight to a PDF. Correct?

You may wonder why I do not just go ahead and try that myself, but I am collaborating with someone else who works in that program.

Thanks

Andrew