Bug Fixes:

• Fixed an issue where shared parameters could not be added to user-defined property sets.
• Fixed a bug where room geometry was shifted during export (#924).

General:

This is the first version of IFC Extension for Revit 2027.

General:

This is the major release of IFC Exporter 25.4.40 for Revit 2025.
It contains various improvements and bug fixes for the previous 25.4.4 version.

Improvements and Bug Fixes:

• Added IFC4.3 Reference View exchange requirements.

General:

This is the major release of IFC Exporter 25.3.40 for Revit 2024.
It contains various improvements and bug fixes for the previous 24.3.20 version.

Improvements and Bug Fixes:

• Added IFC4.3 Reference View exchange requirements.
• Fixed bug where Regulatory Requirement View setup caused model displacement when "Export as the same IFCSite" was enabled.
• Fixed bug where some parts of geometry were placed in a wrong location when linking IFC file.

General:

This is the major release of IFC Exporter 26.4.1 for Revit 2026.
It contains various improvements and bug fixes for the previous 26.4 version.

Improvements and Bug Fixes:

• Added IFC4.3 Reference View exchange requirements.

General:

This is the major release of IFC Exporter 26.4 for Revit 2026.
It contains various improvements and bug fixes for the previous 26.1 version.

Improvements and Bug Fixes:

• Corrected placement of assembly instances when exporting to IFC.
• Ensured rebar and related elements retain the proper material associations in IFC output.
• Fixed exported space elevation so IFC output reflects the correct Z values. (GitHub #907)
• Improved positioning of exported area elements to better align with the source model. (GitHub #891)
• Improved room export ordering to keep schedules consistent with the Revit model.

General:

This is the major release of IFC Exporter 25.4.4 for Revit 2025.
It contains various improvements and bug fixes for the previous 25.4.3 version.

Improvements and Bug Fixes:

• Improved positioning of exported area elements to better align with the source model. (GitHub #891)
• Fixed exported space elevation so IFC output reflects the correct Z values. (GitHub #907)

General:

This is the major release of IFC Exporter 25.4.3 for Revit 2025.
It contains a various improvements and bug fixes for the previous 25.4.0 version.

Improvements and Bug Fixes:

• Added angle units for some exported IFC files that only contained calculated angle values.
• Added explicit handling for IfcReinforcingElement type entity exceptions in schemas prior to IFC4.
• Added export of fabric reinforcement type to IFC.
• Added import of presentation layer assignment for the Open IFC feature.
• Added the ability to control rebar spatial containment when exporting to IFC.
• Added the ability to control the entity type of wall parts when exporting to IFC. (GitHub #756)
• Allowed export of map conversion scale attribute to IFC.
• Allowed export of material constituent fraction to IFC. (GitHub #651)
• Allowed groups to be exported as all IfcSystem types in IFC4.3 (and previous) versions.
• Export some specific geometry as IfcConnectedFaceSet instead of IfcClosedShell.
• Fix duplicated exported faces.
• Fix Schema - IfcMaterialProfileSetUsage.AssociatedTo for 4x3.
• Fixed IfcProductDefinitionShape.ShapeOfProduct export.
• Fixed a bug wrong geometry of curtain walls exported to IFC.
• Fixed a validation issue for Schema Entity Rule - IfcShapeModel.WR11 for 2x3, IFC4, 4x3.
• Fixed an issue to allow export of some files containing tapered walls with inserts to IFC.
• Fixed an issue to allow sub-categories turned off in the view to not be exported when choosing to export only elements in the view to IFC, regardless of the category mapping settings.
• Fixed an issue to include meshes when exporting DirectShape objects categorized as walls to IFC.
• Fixed an issue where an assembly gets exploded in IFC export when elements are DirectShapes.
• Fixed correct use of Operation Type attributes for Doors for IFC4 and 4x3.
• Fixed export of IfcSite.CompositionType attribute.
• Fixed export of multiple openings drawn using the Shaft tool that had the first outline verged exported.
• Fixed export of walls with openings placed next to clippings.
• Fixed export of wrong type entity for IfcSlab for IFC4x3.
• Fixed invalid exported IfcRelConnectsPortToElement.
• Fixed placement of assembly elements with vector correction.
• Fixed the instance view for a link with view overrides when the Revit model is exported using the Export as separate IFCs option.
• Fixed the placement of openings in exported columns. (GitHub #746)
• Fixed the positioning of some ceiling grids exported to IFC using metric templates.
• Fixed the problem with Unable to change the IFC Predefined Type for the IFC4 file exported from Revit.
• Fixed type properties export to IFC with user property set for furniture (IfcFurnishingElementType).
• Fixed unexpected errors exporting to IFC4 this small structural beam with Base Quantities.
• Fixed unexpected errors while exporting door elements to the IFC file at Doors-Shaft.
• Fixed user-defined Table property data type.
• Improved alignment of doors that are slightly off-axis.
• Improved export of combined parameters in schedules to IFC as property sets when they contained type parameter components, project information components, or were empty.
• Improved export of some shape-edited floors to IFC.
• Improved export of some swept geometry to IFC.
• Improved export of volumetric quantities to IFC.
• Improved linking of IFC files when using templates that had constrained levels.
• Improved linking of some grid lines and axes from slightly invalid IFC4 files.
• Improved placement of some linked files when doing a federated export to IFC.
• Improved positioning of elements within assembly when exporting to IFC.
• Improved positioning of some elements that are contained in assembly when exporting to IFC.
• Improved support for some EPSG codes when exporting to IFC4 or higher.
• Improved the accuracy of some quantity calculations when exporting IFC files.
• Improved the export of wall infills to IFC.
• Removed an export of uncertified IfcExtendedMaterialProperties to ifc2x3CV2.
• Removed deprecated attributes LandTitleID /SiteAddress in IFC4.3, supported by Pset_LandRegistration and Pset_Address instead.
• Updated IfcDoorTypeOperationEnum for 4x3 to fix warnings during export to IFC.

General:

This is the first version of IFC Extension for Revit 2026.

General:

This is the minor update of IFC Exporter for Revit 2024.

Improvements:

• Fixed an unexpected export error using RCE.
• Implemented an option that allows exporting properties along with instance properties.
• Newtonsoft.Json version updated.