I get an export error when I try to export a 3dpdf file to any CAD format. I have tried using with Acrobat Pro DC and Acrobat Pro XI (trials). I was able to export the sample files provided by Tetra4D and I was able to export to .prc format but I could not export from my 3D PDF file. I don’t know what software created the original PDF file but it was probably Solidworks 2016. The error message is an unenlightening “Tetra4D Converter error”.