API
Fixed an issue where opening an upgraded file containing Schema that conflicts with Schema in the existing session will delete elements attached by Entities.
Fixed the issue when using a single vertical line to split the Toposolid through API.
Fixed the issue so that the API: NewOpening(Host, CurveArray, Boolean) works for the Toposolid category.

Autodesk Account Sign In
Improved stability when starting Revit.
Fixed an issue in which Revit became unresponsive at the Privacy Settings dialog when launched for the first time using a new Autodesk account.

Background Processes
Fixed an issue that caused the Revit Background Process to hang after getting a disconnect error while using the sizing tool.

Batch Print
Allowed Batch Print in Viewer mode to be used only for unchanged models.

Beams and Braces
Fixed an issue in which the change of the beam section height would also move the beam elevation.

Color Fill
Fixed an issue that flex ducts were not updated in the current view after the flow calculation completed.
Improved the performance of color fill.

Content
Fixed text misalignment issue in some views of Japanese sample models.
Updated the transparency of Water material from 100 to 70 in DefaultJPNJPN.rte.
Added missed Structural Connection content back to South Africa Library.
Fixed appearance missing of material: Solar 72 Cell (Square) in Snowdon Towers Sample Architectural.rvt.
Enabled shadows settings for some 3D views in Snowdon Towers Sample Architecture.rvt.

Coordination Model
Improved stability when a coordination model is linked and an internet connection is not available.

Copy-Cut-Paste
Fixed an API exception issue when copying or mirroring lines in the Revit family editor.

Design Option
Fixed an issue where accepting a primary design option could incorrectly cause some elements to be deleted from the model.

Dynamo for Revit
Performing Save As will now change the GUIDs for all Dynamo Nodes in a graph.
Fixed an issue where the Graph Node Manager extension was missing from Dynamo after Revit install.
Fixed a sporadic issue where Dynamo would take a long time to open.

Electrical Cable Tray and Conduit
Improved stability when working with cable trays.

Energy Model
Fixed an issue that caused analytical spaces to have no people or internal loads.
Added a value to the property OriginatingElementDescription for objects of the class Autodesk.Revit.DB.Analysis.EnergyAnalysisOpening in the public API.

Export DWG/DXF
Improved stability when configuring the DWG Export layer mapping settings.

Export ODBC
Improved stability when setting up database connection in both ODBC and Revit DB link.

Export PDF
Fixed an issue where memory was not returned when printing and exporting uncropped Realistic views on sheets which could cause performance and stability problems if RAM is exhausted.
Fixed an issue that caused the revert export setup not working.

Family
Fixed an issue that could occur when searching in the Family Types dialog.
Fixed an issue that could occur when light fixture families with type catalogs are imported, exported or saved.

Fill Patterns
Fixed an issue where Cut Pattern from the linked RVT is not displayed over the wall in host model because multiple cut patterns for overlapping geometry no longer display.

Floor
Increased stability when floors/slabs are overlapped.

Graphics
Fixed an issue where a repeating detail component was not visible on the screen during placement and when selected.
Improved stability when orbiting in a 3D view set to display with Consistent Colors view style with Ambient Shadows active.

Groups
Fixed an issue related to group member consistency checking, which would occur when adding new elements to a group instance; on group edit finish Revit would trigger the 'Group instances of the same type do not contain identical members' error.
Fixed an issue related to small differences in group member heights when some group instances are hosted on different levels, which on group edit finish Revit would trigger the 'Group instances of the same type do not contain identical members' error.

IFC
Improved linking IFC files with invalid shape representation labels.
Improved the export category mapping table to work regardless of current Revit language.

Import/Export Other
Fixed an issue where selecting certain elements would cause the Launch FormIt with Selected Revit Objects tool to fail.

Import/Export gbXML
Improved stability when exporting to gbXML.

Import/Export/Link SAT/SKP
Fixed an issue that could cause instability when exporting geometry to CAD formats from a model containing non-finite coordinates.

Join Geometry
Fixed some cases where splitting toposolid may fail due to the boolean operation when ruled surfaces occur.
Fixed error message when moving, editing, or rotating a view when elements geometry is joined.

Keynoting
Fixed the issue when a Keynote tag is placed in a legend view and the keynote legend fails to display a value when Keynoting Settings > Numbering Method > By Sheet.

Levels
Improved stability when editing a parameter from the 'Change Parameter Values' dialog, and the change triggers a secondary dialog requiring additional input.

MEP Analytical Systems
Improved stability when generating energy analytical models using different analysis modes.

MEP Connectors
Improved stability when dragging a cutting element by the connector grip from the host element.

MEP Fabrication
Fixed an issue so that invalid connections are disconnected when the configuration is reloaded.
Fixed an issue to allow single connector parts to be connected as expected to open ends.
Added mid point snaps when inserting Fabrication parts.
Fixed an issue to allow taps to disconnect when dragging away from the host.
Fixed an issue so that moving sloped pipe maintains associated pipe supports.
Fixed a sporadic issue with the trim/extend feature to prevent errors being posted that would lead to poor stability.
Fixed an issue to prevent unnecessary couplings from being added when using the trim/extend feature.
Fixed an issue to allow fabrication job files to be exported to network drives.

MEP Miscellaneous
Fixed an issue that caused an nested generic annotations in face-based families to become mirrored when the family is placed on vertical surfaces.

Options Dialog
Removed the Learn more link for the Cloud Model tab in the Option dialog for a consistent Help experience.

Pipe
Fixed an issue where users cannot create the same type of assembly for the identical pipeline contained in the Tap junction.

Project Browser
Improved stability after renaming level name from Project Browser and then clicking Load Family from Ribbon before the renaming reminder dialog prompt.
Improved stability when renaming a view in the Project Browser and clicking Open.
Fixed the inconsistent Japanese font issue on the Project Browser to make it consistent with the canvas and the Properties palette.
Added support for shortcut keys in the Project Browser.
Improved the behavior of the node name in the Project Browser to be fully visible when renaming.

Reinforcement
Fixed an issue where the segment lengths displayed in bending details used the bar length rounding setting, instead of the segment length rounding.
Improved the stability when dimensioning bars in area reinforcement.
Improved stability when placing rebar by two points.
Fixed an issue where the angular dimension text position could not be set to a different value than dimension text position.

Revit Cloud Model (workshared)
Fixed an issue where the user was prompted to relinquish or keep editable elements even after relinquishing everything with the Synchronize with Central command.

Revit DB Link
Improved stability and enabled RDB Link and ODBC Export with Office 365 and Microsoft Access 2016.

Revit Home
Fixed an issue where sorting by time in the Version History page was not done in chronological order.

Route Analysis
Resolved an issue where users cannot create a route analysis when the model contains duct accessories.

Routing Solutions
Improved stability when using the Type Selector to swap fittings when there are several connectors.

Schedules
Fixed an issue where filtering by sheet schedule instances wasn't updating after changing elements in edit mode.

Sheets
Improved stability when using the 'Move Aligned to Sheet' command and an invalid sheet is selected.
Improved stability when using the 'Move Aligned to Sheet' command to move views or other elements in a Revit Cloud Worksharing environment.
Fixed an issue where some annotation schedules set to filter by sheet, such as a Note Block schedule, would not immediately update after moving the elements being scheduled using the 'Move Aligned to Sheet...' command.

Site
Fixed an issue when editing slab shape editor points in different views.
Fixed an issue when generating a toposolid from an existing file that contains a toposurface.
Disabled the unused shortcuts for Toposurface tools.
Removed the Contour Display parameter for Model-In-Place Toposolid as its not applicable.
Changed the hotkey for the Parking Component command from PC to A.

Slab
Fixed an issue when adding vertices on the boundary edges of toposolid when splitting it.

Stair
Improved stability when placing a winder stair.

Startup/Shutdown
Improved stability when closing Revit.

Structural Analytical Model
Fixed an issue in which the analytical column was generated below the physical column by the Analytical Automation - Physical to Analytical script.
Fixed an issue in which the hosted node properties were not preserved when the supporting analytical member was flipped.
Fixed an issue in which analytical elements couldn't be moved/copied inside the model.
Improved stability when accessing the Loads Scaling Display menu.
Improved performance when adding new grids for models with structural analytical model or structural columns.
Fixed an issue in which the structural Floor\Slab Sketch lines displayed parameters from the previous analytical model.
Fixed an issue in which the same keyboard shortcut was assigned to the Structural Loads and Structural Analytical Model menus.
Fixed an issue in which a truss, attached with the top to a 2 slope roof, was retuning a warning message when the Array command was used.
Fixed an issue in which a structural truss would move up/down when it was actually nudged left/right.

Tags
Improved the stability when adding or removing tag hosts.

Twinmotion for Revit
Fixed an issue that could cause material textures from the Autodesk Material Library to not be included in Twinmotion, after adding the Revit model as a Direct Link or exporting to a Datasmith file.
Fixed an issue that could cause the error 'Revit cannot run the external application TwinmotionForRevit' that could display during Revit shutdown.
Fixed an issue where some text in the Datasmith Export Settings dialog was not being properly translated when Revit was run in non-English languages.

User Interface
Provided an error message when Revit is not stable at startup due to CefSharp initialization failed.
Fixed an issue where the "Curved" icon appears to be the same as the "Two Segments" icon.
Fixed an issue where Revit would hang during startup if a color book with errors was added.
Improved the display of the icon of the browser edit control in dark theme for some dialogs.
Improved the disabled display of the solution image button in the Options bar.
Improved stability when rendering the Revit UI layout.
Updated the style of the browser edit control in the Properties palette.
Improved the display of the type selector borders.
Improved Revit sign-in or sign-out stability.

View
Fixed the issue that annotations such as spot elevation, dimension, or tag disappear or become empty when the Revit model is closed and reopened.

Walkthrough
Improved stability when launching the Options dialog from the Export Walkthrough dialog.

Wall
Fixed an issue when trying to create a wall of a wall type that was last used as a tapered wall which no longer supports the tapered cross-section.
Fixed an issue where alternating between the wall tool and the family browser to create walls may result in incompatible cross-section parameters.