Setting Specific Coefficient for each duct fittings

Dear Experts,
I found script by Kulkul which adding specific coefficient value to duct fittings. Script changed the value at the revit file specific coeficient dialag box (see attached photo). However when runing duct pressure loss analyze it is not taking value from dialog box.

Please help.
Script:
Change-Coeff.-loss-fitting-duct.dyn (7.5 KB)

Help :roll_eyes: