bim-forge (Frederik91) errors

3 recurring problems engineers report in bim-forge (Frederik91), ranked by impact.

#153 by errors trackedMCAD

Recurring bim-forge (Frederik91) errors, by impact

  1. 1An LLM BIM authoring tool correctly read a wall's properties and units, then failed to place a cube 500 mm clear of that wall. The AI gets identity, transform, properties and units, but no product mesh or world bounds, and there is no linked-geometry query. 'This is not yet a geometry-awareness demonstration.'MCAD · Agent failure · 1 report66
  2. 2real IfcOpenShell IFC4 exports checked against the native model with an explicit loss inventory failed exchange check EX-02, came out inconclusive on EX-08, and a roundtrip added four failed observations including bounded-property loss.MCAD · Agent failure · 1 report66
  3. 3Research on how an LLM should see BIM geometry: the IFC data sent to the model had identity and properties but no geometry, and outer bounds cannot certify openings or free space. The proposed flow is pinned identity, then bounded discovery, then measured geometry, then human review.MCAD · Agent failure · 1 report66

How it fails

  1. Agent failure3

Engineering tools that address these errors

Sourced from public community reports. Costs and delays on individual entries are modeled estimates, not measurements.