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Preflight

In one sentence: Run a set of validation checks on the BIM model before IFC export to catch common data errors.

Overview

Workbench: BIM
Menu: Manage → Preflight
Command: BIM_Preflight

Runs a set of automated validation checks and reports any issues before IFC export. Failed checks are listed with a link to the offending element so you can fix them before exchange.

Checks performed

Check What it verifies
IFC hierarchy Every element is inside a valid Site → Building → Storey container
IFC classes No elements have the generic default IfcBuildingElement class
Solid geometry All elements produce valid closed solids
Openings All doors and windows are hosted by a wall
Materials All structural elements have a material assigned

Common mistakes and pitfalls

IFC export produces empty file

Failing the IFC hierarchy check is the most common cause. Place all elements inside a proper Site → Building → Level hierarchy and re-run Preflight.

See also