Revit 2024-25 Duct Transition Stepped End Length Value Wrong

[craigjonnson]

The new connector developments have broken the length value for transitions with a liner step-down connection.
The length value does not include the step-down length.
This is not an issue in 2020 to 2023.
For reference, our database is managed within 2020.

The pattern development within the fabrication products CAM, EST, etc. reports 800mm, 50mm shorter than whats drawn in Revit if using fabrication products 2023 or earlier.
Fabrication CAM, EST, CAD, 2024-2025 develops the correct length.

[CraigFarish]

Hi Craig

I'm sorry you are experiencing issue here.

Step downs are the current main focus of the core team. We published a PR recently that contained the majority of these changes which includes new switches to specify where you want the step lengths (extensions), inclusive or exclusive of the end extensions and lengths (where appropriate).

The PR has recently expired, but we will be updating it. Not that this will help you in the version you're using, however it may give you some insight into what could be included in a future version.