PR: Multiple IFC types for single Revit type element
- Dominant language
- C#
- Stars
- 637
- Forks
- 225
- PR merge metrics
- No merged PRs in 30d
Description
### Problem Description
I have a single alarm type, which has 10 instances in a model. It is exported as 3 different types, with the same name and information.
When I check the ifc file within Solibri or Notepad, the only different information is GUIDs for those types. The instances in the project are seperated as 1-4-5. Normally, they should all belong to the single Ifc type.
This behaviour is not version specific. I attached the model (default revit template with the 10 instances of the same type). Also, using standard 2x3 CV export or IFC4RV export, or using or not using userdefinedpropertyset file doesnt change the behaviour.
[test_for_ifc.zip](https://github.com/user-attachments/files/17042457/test_for_ifc.zip)


### Revit Version
2022.0.x
### IFC for Revit Addon Version
24.x.x
### Windows Version
10 22H2
Contributor guide
Research direction
Reproduce the report using the attached test_for_ifc.zip with Revit 2022 and inspect the resulting IFC in Solibri or a text editor. Compare standard IFC 2x3 CV and IFC4RV exports, with and without the user-defined property set, and consider the issue complete when the 10 instances of one Revit type are assigned to one IFC type.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- csharp
- Domain
- desktop-dev
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100