For teams involved in openBIM workflows, this is the most valuable fix.
According to Autodesk’s official release notes (Readme document), the 2020.2.9 hotfix addresses two primary categories: Security and Stability. Here is the breakdown.
If you use BIM 360 Design (now Autodesk Docs), Revit 2020.2.9 is mandatory. Earlier versions (before .2.9) have a known issue with the Desktop Connector that corrupts file paths when using "Reload Latest." revit 2020.2.9 hotfix
No software update is perfect. Users on the Autodesk Forums have reported two edge-case issues with Revit 2020.2.9.
Release Date: October 2022 Build Number: 20200915_1515(x64) For teams involved in openBIM workflows, this is
The Revit 2020.2.9 Hotfix was a critical maintenance update released by Autodesk. Because Revit 2020 was a "multi-year" release (supported longer than the standard 3 years due to industry demand), this hotfix addressed specific security vulnerabilities and stability issues that emerged long after the initial launch.
Key Highlights:
Even a simple hotfix can go wrong. Here is the troubleshooting matrix for 2020.2.9:
| Error Code | Message | Solution |
| :--- | :--- | :--- |
| 4002 | "Expected product version not found" | You do not have Revit 2020.2 base version. Install the full 2020.2 Update first. |
| 1402 | "Could not open key: UNKNOWN" | Registry permissions issue. Run the installer as Domain Admin or use Microsoft SubInACL tool. |
| 1603 | "Fatal error during installation" | A previous patch is stuck in pending reboot. Reboot the machine completely, then disable antivirus temporarily. |
| N/A | "Hotfix hanging at 0%" | The .NET framework cache is corrupt. Run sfc /scannow in CMD, then retry. | No software update is perfect