IFC Broken References

Diagnose and fix two distinct reference faults in an IFC instance file : a dangling reference (a #id token that resolves to nothing or to the wrong entity type) and a missing INVERSE link (a relationship entity that was never created, so an element has no material, no property set, or no spatial location). The first is a hard failure a parser or validator catches. The second is a silent failure no schema check ever reports.

For STEP syntax and header errors see ifc-errors-encoding-issues. For EXPRESS WHERE and global-rule violations see ifc-errors-schema-validation. For loading and traversing a model see ifc-impl-reading-parsing.

Quick Reference

An IFC file is a reference graph