MEP CIrcuit reference UK standard

Hi Everyone,

I am trying to change my circuit reference in Revit 2019 so that it matches the UK standard so it is way then phase not phase then way as revit automatically uses. I have tried to create a dynamo script to do this and change the parameters within my model however when I run it it says there is no parameter found with that name.

I have uploaded an image if anyone can see anything I have done wrong I would be very grateful for some tips.

Thank you! :blush: