Revit 2027.4 Update

• Autodesk Assistant SDK - version 1.0.34.1
• ADP Desktop SDK - version 7.0.14.0
• IFC Parameters for Revit 2027 - version 27.4.0.31
• Personal Accelerator - version 24.4.57.0
• Core Package Component for Revit 2027 - version 27.4.0.31
• Core Addition Package Component for Revit 2027 - version 27.4.0.31
• Core Package Component Cloud for Revit 2027 - version 27.4.0.31
• Core Extension Package Component for Revit 2027 - version 27.4.0.31
• Core Package Component Shared for Revit 2027 - version 27.4.0.31
• Dynamo Core for Revit 2027 - version 27.4.0.31
• Dynamo Samples for Revit 2027 - version 27.4.0.31
• Core RVT Package Component for Revit 2027 - version 27.4.0.31
• Core RVT Package Component Cloud for Revit 2027 - version 27.4.0.31
• Product Feedback for Revit 2027 - version 27.4.0.31
• Revit AI Assistant for Revit 2027 - version 27.2.1.4

Dynamo for Revit

• Upgraded Dynamo Core version to 4.2.2.

File Open/Save

• Updated zlib library to version 1.3.2

Forma Connected Client

• Added the ability to partially convert acquired Forma contextual data to Revit-native elements with Create from Selection, using the methods of Sketch Area or Select Items, to focus detail modeling on relevant site context without converting the entire dataset or losing unconverted contextual data as reference.
• Fixed an issue where the Forma scenario connection indicator was missing from recent models on the Revit Home page in a new session.
• Added the ability to run Forma Daylight Potential Analysis directly in Revit and visualize results on exterior building surfaces.

Graphics - Image Import/Export

• Improved performance and usability when inserting a PDF with a large number of pages.

Insight for Revit

• Improved the Analyze workflow for workshared collaborative projects: Revit reloads the latest changes, syncs with central, and regenerates the Energy Analytical Model, so the model submitted for analysis always reflects the latest version.

General

• Addressed potential security vulnerabilities.

Analytical Model

• Fixed an issue when updating a floor with the Analytical to Physical script that would generate a warning that sketch lines created with Pick Wall are not parallel to a wall.

Autodesk Assistant

• Fixed an issue where Autodesk Assistant could become blank or unresponsive after closing Dynamo if the Assistant was opened after Dynamo. The Assistant now remains available without requiring a Revit restart.

Beams and Braces

• Fixed an issue where arc length dimensions could not snap correctly to the endpoints of curved elements when the measured arc exceeded 180 degrees.
• Fixed an issue when upgrading models where sloped/inclined beams would become disassociated from their work plane and their cross-section rotation would reset to 0° when another beam was joined to their side.

Dimensions

• Fixed an issue when using the Measure tool where the Total Length value on the contextual ribbon was grayed out and could not be copied.

Duct/Pipe Sizing

• Fixed a precision issue in the MEP Sizing Calculator that caused the calculated flow to display as varied when more than one pipe or duct with identical flows were selected.

Electrical Circuits

• Improved performance when editing circuits on models with large electrical systems. Previously, clicking Edit Circuit could take up to a minute because the distance to each candidate panel was recalculated repeatedly while sorting the panel list.
• Fixed an issue where an individual circuit could not be created for a nested electrical connector in a multi-circuit family.

Export FBX

• Updated the FBX SDK to address security vulnerabilities CVE-2026-10709 and CVE-2026-10710.

Family

• Fixed an issue where the Schedule Level parameter could be assigned an unexpected level when placing Work Plane-based families.

File Open/Save Internals

• Improved stability on document open when a third-party addon creates a dockable panel but fails to initialize it properly.

IFC

• Resolved an issue where the IFC Parameters dialog would not open when editing family type parameters and clicking the … button.

Import/Export/Link STL/OBJ/STEP

• Improved stability when importing OBJ/STL files with small geometric details.

Join Geometry

• Improved stability when performing various operations on Revit elements/models.

License

• Fixed an issue causing Revit to remain open after license loss.

MEP Connectors

• Fixed an issue where connector controls did not appear on pinned elements.

MEP Fabrication

• Fixed an issue introduced in Revit 2026 where pattern 866 straight lengths could be calculated incorrectly when using connector adjustments in specific configurations.
• Improved stability when Revit would unexpectedly close after opening views containing fabrication part tags.

Pipe

• Fixed an issue where the sloped pipe preview did not appear in elevation.
• Fixed an issue where inherit elevation didn’t work with sloped piping.
• Fixed an issue that prevented creating a sloped pipe steeper than the connected pipe.

Project Browser

• Fixed an issue that moved the text cursor to the end of the field when editing text in the search bar of the Project Browser.

Revit Home

• Fixed an issue where pinned items on Revit Home couldn't be unpinned from the Recent page after being deleted and resaved.
• Fixed an issue where Revit Home failed to load after several refreshes.
• Fixed an issue where Revit Home did not preserve the selected List view mode after restarting Revit.
• Fixed an issue where models shared across projects via Bridge were unexpectedly visible in the Revit Home model list.

Room/Area/Space

• Fixed an issue that caused the application to close unexpectedly when using the RoomTag.TaggedLocalRoomId API property to retrieve tagged room information from the host model when the room was in a linked model.

Selection

• Fixed an issue where the FilteredElementCollector API could cause Revit to close unexpectedly when collecting elements from a linked model that was not visible in the specified view.

Steel Connections

• Fixed an issue where a Revit Serious Error occurred when closing the Edit Connection Type dialog for a structural steel connection that had duplicate Type Mark values.

Structural Analysis Results Exploration

• Fixed an issue that blocks the user from moving forward if they have invalid analysis results.

User Interface

• Fixed an issue where some dockable panels, including Reconcile Hosting, Properties, System Navigator and Workplane Viewer, reopened on their own after you closed them and then switched documents or went to Revit Home.
• Improved stability after adding the Hide in View tool to the Quick Access Toolbar.