IfcOpenShell (IfcOpenShell)MCADConfidence: Medium

IfcOpenShell 0.9.0.post1 dropped reading IFC4X1, IFC4X2, IFC4X3_TC1, IFC4X3_ADD1 and IFC4X3, keeping only IFC2X3, IFC4 and IFC4X3_ADD2. The reporter still frequently sees files from Revit 2023/2024 with IFC4x3 as the written schema identifier, so they are holding off on upgrading.

Impact Analysis

Persona

Mechanical Designer

Team Size Impact

5x Multiplier

Prototype Delay

3 Days

Est. Annual Cost

$30,000

1 user · 1 month240 min
Rest of team960 min
Rest of year13,200 min

monthly_minutes × 12 × team_multiplier ÷ 60 × $75/hr = $30k/yr

$75/hr assumed rate.

Annual team-minutes decomposed from the reported monthly inputs.

Evidence & Sources

1 Sources

IfcOpenShell/IfcOpenShell Issue #10086: IFC Openshell Python version `0.9.0.post.1` dropped many IFC schemas

github.com

→

Analyst Notes

From the Grok pain-radar digests, Oct 28-29 2026 (Oct 28 8:41 AM ET through Oct 29 early-morning Haitch editions). Verified live 2026-10-29: issue/PR read; title and state confirmed.