please suggest , the way forward.
What does the warning say?
the warning is

where is that from ? strange it isnt have mechinicalsystemtype input, i would try with mepover or openmep
thank u , i tried all the option, but i could not find the solution. where is mistake.
allright you feed in a string, try feed in the mechinicaltype element and ducttype element…
this one will more easier if you are using library OpenMEP, python now is more headache:
https://chuongmep.github.io/OpenMEP/api/OpenMEPRevit.Element.Duct.html#OpenMEPRevit_Element_Duct_CreateByLine_Revit_Elements_Element_Revit_Elements_Element_Revit_Elements_Element_Autodesk_DesignScript_Geometry_Line_System_Double_System_Double_
thank u
probably…could you show all your nodes expanded so we can see whats go through, does it works if you use some of Chuongs nodes ???













