Hello @Anonymous

Thank you for your post and welcome to the community!

Just to be sure we are on the same page, what Fabrication program are you using (CADmep?) and what version, you can find out what version you are running by typing appinfo into the command line.  Please send me a screen shot of this information.

In addition to the app information can you also please send me screenshots of the what you are seeing with your duct work and not on your pipework containment or circular duct?

Thank you and I look forward to your thoughts!