Revit 2026.5.1 Update

• Microsoft ASP.NET Core Runtime 10.0.10 (x64) - version 10.0.10.36226
• .NET Windows Desktop Runtime 10.0.10 (x64) - version 10.0.10.50000
• Microsoft Visual C++ 2015-2022 Redistributable (x64) - version 14.50.35719.0
• Microsoft Visual C++ 2015-2022 Redistributable (x86) - version 14.40.33810.0
• Microsoft Edge WebView2 Runtime Installer - version 1.3.211.7
• ADP Desktop SDK - version 7.0.14.0
• Autodesk Shared Components 2026.8 - version 1.12.0.3
• Autodesk CER Service - version 7.2.5.982
• RealDWG Shared 2026 - version 25.1.179.0
• FormIt Converter For Revit 2026 - version 26.5.10.38
• Generative Design For Revit - version 26.6.3.0
• Interoperability Engine Manager - version 1.3.2.2
• IFC Parameters for Revit 2026 - version 26.5.10.38
• Personal Accelerator for Revit 2026 - version 24.4.56.0
• Addins Manager for Revit 2026 - version 26.5.10.38
• Batch Print for Revit 2026 - version 26.5.10.38
• Core Package Component for Revit 2026 - version 26.5.10.38
• Core Package Component ATF for Revit 2026 - version 26.5.10.38
• Core Package Component Cloud for Revit 2026 - version 26.5.10.38
• Core Package Component Shared for Revit 2026 - version 26.5.10.38
• Dynamo Core for Revit 2026 - version 26.5.10.38
• Dynamo Docs - version 26.5.10.38
• Core Package - RVT Component for Revit 2026 - version 26.5.10.38
• TwinMotion Package Component for Revit 2026 - version 26.5.10.38
• Autodesk Results Explorer Manager - version 26.0.2.12048
• Autodesk REX Framework - version 26.0.2.12048
• Autodesk REX Revit - version 26.0.2.12048
• Autodesk RSA Common Data - version 26.0.2.12048
• Autodesk RSA COM - version 26.0.2.12048
• Autodesk RoReinf - version 26.0.2.12057
• Product Feedback for Revit 2026 - version 26.5.10.38
• Carbon Insights for Revit 2026 - version 26.5.10.38
• Worksharing Monitor for Revit 2026 - version 26.5.10.38
• Geospatial Coordinate Systems - version 15.1.44.0

General

• Addressed potential security vulnerabilities.

API

• Improved model upgrade reliability to prevent some Revit 2024 models from incorrectly reporting file corruption when opened in newer versions of Revit.

Advance Steel Extension

• Fixed an issue in which the Force/Moment values from analysis results did not populate the Code Checking module in Steel Connections.

Copy-Cut-Paste

• Fixed a performance issue where copying many in-place elements could take hours.

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.

Export PDF

• Fixed an issue where Revit became unresponsive when exporting to PDF with the Export in Background option enabled.

File Open/Save Internals

• Addressed potential security vulnerabilities when opening Revit files.
• Improved stability on document open when a third-party addon creates a dockable panel but fails to initialize it properly.

FormIt Converter

• Restored the Edit in FormIt button for FormIt links.

IFC

• Fixed an issue that prevented IFC exports to network folders.
• Improved Revit stability when opening/importing a malformed IFC file containing cyclic placement relationships.
• Fixed color export in IFC 4 Reference View.

Import/Export Data Exchange

• Fixed an issue so that parameters from Data Exchanges created outside of the US are accessible.
• Fixed an issue where loading Data Exchanges with certain types of parameters would fail.
• Fixed an issue where custom properties from the Parameters Service were not loaded in Revit for non-US region hubs. Regional server routing now works correctly, ensuring all custom properties appear as expected.
• Fixed an issue where room geometry failed to load when opening a Revit 2026 exchange containing rooms. Room geometry now loads correctly across versions.

Import/Export/Link STL/OBJ/STEP

• Fixed an issue that prevented STEP files on Desktop Connector from being linked into Revit.
• Improved stability when importing OBJ/STL files with small geometric details.

MEP Fabrication

• Fixed an issue where Route and Fill checked out extra elements after the command finished.
• Fixed an issue introduced in Revit 2026 where pattern 866 straight lengths could be calculated incorrectly when using connector adjustments in specific configurations.

Pipe

• Improved stability when modifying the system after starting the Pipe command.

Print

• Fixed an issue in views using MEP Hidden lines where the outer line of the duct/pipe/wire was missing in vector print/export when it was a parallel edge to a second duct/pipe/wire at another height inside the set gap distance.

Project Browser

• Fixed an issue that caused the Project Browser to become unresponsive when dragging views onto sheets.

Revit Cloud Worksharing

• Fixed a permission issue that could occur when opening a Revit Cloud Model in Forma Data Management.
• Improved resiliency of the Sync with Central and Model Open dialogs.
• Fixed an issue where Synchronize with Central failed for a cloud model that had been restored to a previous version.

Roombook

• Improved stability when calculating and adding areas within Areabook.

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.

Startup/Shutdown

• Improved stability on Revit startup.

System Zones

• Fixed an issue that caused a system-zone to be deleted if an assigned space is deleted.