Warning · Data quality
How to fix Duplicate name
in IFC files
Make sibling element names unique (or rely on type + instance number) so elements are distinguishable in schedules and coordination.
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No account · No upload · Runs in your browser · 38 validation checks
What it means
The Duplicate name check
Two or more siblings share the same Name
The fix
How to fix Duplicate name in your authoring tool
Concrete, tool-specific steps. The check itself is schema-agnostic and works for IFC2x3, IFC4, IFC4x1 and IFC4x3.
| Authoring tool | How to fix |
|---|---|
| Revit | Duplicate names usually come from identical type names or marks. Use the instance Mark parameter (unique per element) or rename types, and resolve Revit’s duplicate-Mark warnings. |
| ArchiCAD | Use the ID Manager (Document ▸ ID Manager) to auto-assign unique element IDs so siblings don’t share a Name. |
| Tekla | Run numbering (Drawings & reports ▸ Numbering) so each part gets a unique position/part mark mapped to Name. |
| Allplan | Assign unique attribute values (e.g. component number) via the attribute palette so siblings don’t share a Name. |
How it works
Find and fix it in the browser
The whole flow runs client-side — your IFC file never leaves your machine.
01
Open your IFC file
Open IFC Viewer Online and drag & drop your IFC file. It is parsed locally in your browser via WebAssembly — nothing is uploaded.
02
Run the Health Score validation
Run validation. The "Duplicate name" check (RULE_DUPLICATE_NAME) flags every affected element and pinpoints it in the model tree.
03
Fix in Revit
Duplicate names usually come from identical type names or marks. Use the instance Mark parameter (unique per element) or rename types, and resolve…
04
Fix in ArchiCAD
Use the ID Manager (Document ▸ ID Manager) to auto-assign unique element IDs so siblings don’t share a Name.
05
Fix in Tekla
Run numbering (Drawings & reports ▸ Numbering) so each part gets a unique position/part mark mapped to Name.
06
Fix in Allplan
Assign unique attribute values (e.g. component number) via the attribute palette so siblings don’t share a Name.
07
Re-validate
Re-export from your authoring tool and re-run validation to confirm the issue is resolved and your Health Score improved.
Related checks
Other Data quality checks →
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