You don't need to create a VPL when using Fabrication CAMduct 2016 or later. The 2016 version introduced a custom machine configuration feature which may be configured to work with any machine.

Per the What's New section of the Help System:

The following new features are specific to Fabrication CAMduct 2016
Custom (User Defined) Machine Configurations: You can create custom (user-defined) machine code (NC) for defining installed machine fabrication (motion path and cutting) behavior. See Installing a Custom NC Machine.

You will find a recorded session on this topic from Autodesk University 2015. 

As for exporting the nested shapes or sheets, why? You use Fabrication CAMduct to write NC and send to the machines.

Hope this helps.

If you can give more details it will be helpful.

At the  autodesk university there is no explanation about tne custom nc.

Maybe give a small sample of how to do it.

Watch this session presented by Willam Tucker

Advanced CAMduct Multiple Machine Configuration Including Using the New “Custom NC”

This is a complext topic. If you cannot grasp it from this video, retain a consultant to avoid problems and wasted efforts.

Hi, 

Unfortunately there is no any explanation abot the "Custom NC" at this session 

My apologies. The original presenter became ill and could not attend AU, so William Tucker offered to teach the class with little notice. I didn't realize he didn't cover that topic. Other than the latest Help files for Fabrication CAMduct, there is no other information published that I am aware of.

I'm not sure where you are geographical, so I will offer two consultants who can help you. Both are very good.

David Dykes is in England. He was, until a few months ago, the primary product support tech at Autodesk for Fabrication CAMduct. He now has his own consultancy. He's, by far, your best choice. https://uk.linkedin.com/in/david-dykes-6979815b

Garrett Tice is also available and resides in the USA. https://www.linkedin.com/in/garrett-tice-6a928b72