Try running one export with insulation on to its own file, i.e. Pipes-with-insul.rvm and then one without insulation on, i.e. Pipes.rvm. You can then append the 2 into one nwd, i.e. Pipes-review.nwd. This will allow you to hide the one with insulation when required as in the selection tree you will have to main elements. As for the PDMS attributes you could do as suggested with 2 rvms but convert each rvm to nwd before you append them together. Make sure Pipes.rvm have the attribute file in the same folder when creating the nwd and the Pipes-with-insul.rvm doesn't have the attribute file in the same folder. Then when you append the 2 nwds into one you should only see attributes on the Pipes.nwd.
Try running one export with insulation on to its own file, i.e. Pipes-with-insul.rvm and then one without insulation on, i.e. Pipes.rvm. You can then append the 2 into one nwd, i.e. Pipes-review.nwd. This will allow you to hide the one with insulation when required as in the selection tree you will have to main elements. As for the PDMS attributes you could do as suggested with 2 rvms but convert each rvm to nwd before you append them together. Make sure Pipes.rvm have the attribute file in the same folder when creating the nwd and the Pipes-with-insul.rvm doesn't have the attribute file in the same folder. Then when you append the 2 nwds into one you should only see attributes on the Pipes.nwd.
