As can be seen in release notes below, most of these are “Improves stability…” fixes.
Platform Annotation Improves stability when creating dimensions.* Family Improves stability when editing families*. IFC Improves placement of the site on Open IFC if the site is located away from the origin, or rotated. Schedules Improves data integrity of a schedule instance on a sheet with the schedule view.* Corrects the name of the Default Structural Area Reinforcement Schedule.* Selection Improves stability when attempting to use the Selection Box tool in Reveal Constraints mode.* Upgrade Improves stability when upgrading a model containing corrupt families.* Improves stability when upgrading projects which may have some corruption.* Improves stability when opening or upgrading a Revit 2015 project which contains stairs.* Views Corrects an issue causing view filter names to be automatically appended when workshared models are synced. Improves stability when editing selection sets in a workshared model.* Improves data integrity of Project Address for upgraded projects.* Improves stability when selecting a viewport with the Select by ID tool.* Improves stability when canceling out of the view templates dialog.* Worksets Improves stability when deleting an element which may have an invalid ID.* Worksharing Improves stability when using the Options dialog to log into A360 from a workshared central file.*
Architecture Wall Improves stability when editing stacked wall types*. Improves stability when cutting rooms to the clipboard.* Improves stability when clicking Edit Preview in the wall structure dialog.* Improves stability when editing the structure of walls.*
MEP Annotation Improves placement fidelity with wire tags when upgrading a project.* Electrical Improves stability when no panel schedule template is assigned as the default.* Fabrication Improves connection consistency of taps. Groups Improves visual fidelity of lighting fixtures within a copied group after the original group is modified.* Mechanical Improves stability when using Mechanical Settings.* Pipe Improves stability when upgrading a project that contains user-created pipe types.*
Structure Analytical Model Improves stability when opening a project which contains a Structural Isolated Foundation with an invalid analytical model defined as a column.* Families Improves stability when placing a slanted column or a beam based on a Generic Model Line Based family.* Improves stability after reloading an annotation symbol family used as a symbolic representation of brace elements on plan views.* Scheduling Improves stability when selecting a viewer element associated with Graphical Column Schedule.*
API Improves stability when using Dynamo and the function: Select Divided Surface Families.* Improves stability when DimensionSegment ValueOverride API is called when the dimension value was not overridden.* Improves error handling with element’s methods/properties.* Improves consistency of UIApplication.PostCommand for pre-selection.* Improves error handling with ElementCategoryFilter.* Improves stability when editing families which use external resources for keynotes.* Adds a validator to the Rotate Tap API to guard against creating invalid models. Improves error handling with UIDocument.PromptToPlaceViewOnSheet() function. Improves consistency of the RebarContainer element.*
Most of these are bug fixes, and some BIM360 Glue integration performance improvements. Details and direct links below: Autodesk Navisworks 2016 Service pack 2 delivers user experience and stability improvements to the Autodesk BIM 360 integration. Service pack 2 also addresses problems identified in other parts of Autodesk Navisworks 2016. Service Pack 2 also includes all of the updates from Service Pack 1. Service Pack 2 can be installed on either the original version or the Service Pack 1 version of Autodesk Navisworks 2016.
The focus of Autodesk Navisworks 2015 Service Pack 3 is the resolution of Revit interoperability issues. Service Pack 3 does resolve issues identified in other parts of the product, we recommend you refer to the supporting documentation for the detail.
Service Pack 2 resolves an issue opening and appending multiple files in a single operation. The Service Pack also resolves issues identified in our Point Cloud support, Autodesk Rendering, Quantification, Clash Detective, and interoperability.