Hello R Muller,
Thanks for the PLA. Seeing the problem myself helped a lot!
It looks like this is because of an issue with Stair/Railing sub-elements and Renovation (issue #265703). In your project the Renovation Status of the Railing is New, but if you enter Edit Mode, you will see that some elements/segments somehow defaulted back to Existing. This should not be possible, so ARCHICAD can't switch them back from this "custom" state (it sees that they are different, but can't change the Renovation Status). We want to fix this, but we would need to find out how it gets into this state first. If you can reproduce this, and show us how to reach this state, that could help a lot!
Anyhow, the solution to this is quite simple actually: just select the Railing, and change its Renovation Status to something else and then back to New. This will reset the Renovation Status of all Segments and Nodes, and you will be able to reset the custom Segments.
Let me know if this helped!
Daniel Alexander Kovacs
Professional Services Consultant
For Troubleshooting and useful Tips & Tricks visit