A particularly nasty bug affected teams using Revit Server or BIM 360. When a user attempted to Relinquish All Mine before closing the model, Revit would throw error InternalException 3.4.5. This sometimes led to a corrupt local cache, forcing users to re-download the entire central model (wasting 30–45 minutes per incident). The Revit 202029 Hotfix corrects the database transaction handshake.
Users reported that in rare cases, saving to the cloud (BIM 360 Document Management) would produce error "Model Cannot be Saved – 202029". This hotfix specifically targets and eliminates that error.
Please confirm:
I can then generate a detailed changelog, deployment checklist, or rollback procedure.
Revit 2020.2.9 Hotfix (Build: 20.2.90.12) is the final security and stability update released for the Revit 2020 product line. This hotfix was primarily designed to address critical vulnerabilities and ensure the software remains operational within the Autodesk Support Lifecycle Key Improvements & Fixes Security Patches
: Includes critical security updates to protect against potential vulnerabilities identified by Autodesk Support Stability Enhancements
: Resolves issues that caused intermittent crashes when using cloud-shared models or specific MEP detailing tools. Accumulative Fixes revit 202029 hotfix updated
: This hotfix replaces all previous updates (2020.2.1 through 2020.2.8). If you missed those, 2020.2.9 includes all their respective improvements. Installation Requirements Base Version
: You must have Revit 2020 (or a later update like 2020.2.x) installed to apply this hotfix. Admin Rights
: Ensure you have administrative privileges on your local machine before starting the installation. Cloud Models
: If you are working in a BIM 360/Construction Cloud environment, it is highly recommended that all team members update to the same version to avoid sync conflicts. How to Access the Update Autodesk Access : Open the Autodesk Access App
(formerly Autodesk Desktop App) on your PC; the update should appear in your "Available Updates" tab. Autodesk Account Portal : Log in to your Autodesk Management Page
, navigate to "Product Updates," and search for "Revit 2020.2.9" to download the standalone executable. Note on Support Lifecycle: A particularly nasty bug affected teams using Revit
As of early 2025, Autodesk has moved Revit 2020 into the "Legacy" category. While this hotfix remains available for existing subscribers, technical support and further updates for this version are limited. Are you experiencing a specific error during the installation, or are you looking for a full list of resolved issues for a specific Revit discipline? Revit 2024 Updates - Autodesk product documentation
Revit 2020.2.9 Hotfix , released on May 17, 2022, serves as the final and most comprehensive security and stability update for the Revit 2020
product line. Although Revit 2020 is now technically outside of Autodesk's standard support lifecycle
, this hotfix remains critical for users maintaining legacy projects. Key Improvements & Fixes
The update primarily targets security vulnerabilities and cloud connectivity issues: Security Patching : Addresses significant vulnerabilities associated with importing SketchUp files components. Cloud Worksharing : Fixes a critical bug where Revit Cloud Worksharing models failed to open due to missing metadata. MEP Stability : Improves performance when connecting Fabrication MEP parts that use connector adjustment logic. Translation
: Corrects Chinese translation errors for "Calculation in Progress" messages. BIM there. Done that. Critical Considerations for Users Cloud Connectivity Issues I can then generate a detailed changelog, deployment
: Some users reported that installing the 2020.2.9 hotfix caused BIM 360 linked models to stop working, displaying errors about missing add-ins. Collaboration Fixes
: It is recommended for resolving "Can't obtain permission to edit element" errors, especially when moving central models to new network locations. Cumulative Nature
: As the latest update, it replaces and includes all fixes from previous hotfixes (2020.2.1 through 2020.2.8). Autodesk Community, Autodesk Forums, Autodesk Forum Installation Details Available Revit Updates & Add-ons - Autodesk
Here is the guide for applying the Revit 2020.2.9 Hotfix.
Hotfixes modify core software files. Follow these steps to prevent data corruption: