Copy the code I gave you    item.insspec = "None"     open notepad and paste the code in there.

Save the text document with the extension ".cod".  Just fill in the filename and include the extension in the save dialog.

Then in your drawing run the command EXECUTESCRIPT and browse to the saved file. Select the items you wish to reset the insulation spec setting on and hit ENTER.  You won't see any visual difference but after it processes you will be able to control the insulation using MPROP again.  The script is just resetting the insulation spec.  More can be added to actually remove or add insulation so you can see visual differences when it runs.

If this is all new to you I encourage you to research Fabrication CADMEP scripting.

https://knowledge.autodesk.com/support/fabrication-products/learn-explore/caas/CloudHelp/cloudhelp/2...

rem insulation variables
rem item.insulation.materiallock = 
rem item.insulation.statuslock = 
rem item.insulation.status = 
rem item.insulation.material = 
rem item.insulation.gauge = 
rem item.update()