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This is 2026.9 documentation. Coverage here is incremental: a page exists only where 2026.9 differs or is newly documented. For any other topic, switch to Current (2026.8 and earlier) in the version selector.
Scripts and reports that expect the earlier data format can stop working when a workspace moves to 2026.9. Compatibility mode keeps ACC sync and drag-and-drop uploads in that format while you update the tools that read the data. For ACC hub setup that does not change, see Enable Autodesk Forma Data Management integration. For the user-facing migration steps, see Speckle’s data model is changing.
Compatibility mode ends for every workspace on 1 November 2026, whenever it was turned on. From that date, ACC sync and drag-and-drop uploads write the 2026.9 format. Update dependent scripts and reports before then.
For changes to accepted file extensions, see File uploads in 2026.9.

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When to request it

Compatibility mode is a short bridge while you update downstream tools. It is not a way to stay on the old format. Request it when all of the following are true:
  • The workspace uses ACC sync or drag-and-drop uploads.
  • Something downstream of Speckle depends on the old data format.
  • You cannot update that downstream tool before the workspace starts writing the new format.
Do not request it only because connectors are still on an older release. Connector upgrades have their own window. See Plan the connector upgrade window.

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As a workspace admin

Identify whether any project uses ACC sync or drag-and-drop, and whether any script, custom report, or other tool reads that data in the old format. If it does, ask Speckle to switch the workspace into compatibility mode now. It is not self-serve, and it ends on 1 November 2026 regardless of when it was turned on. After Speckle confirms the workspace is in compatibility mode, ACC sync and drag-and-drop continue to write the old format until you ask to leave it, and no later than 1 November 2026. On that date every workspace leaves compatibility mode, whether or not downstream tools are ready. Contact Speckle in-app, through speckle.community/help, or via your Customer Success Advisor.

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As an IT administrator

Compatibility mode does not change ACC hub enablement, firewall allowlists, or connector installers. Keep using the IT Setup Guide for those tasks. Identify tools that read data from ACC sync and drag-and-drop uploads, and update them before 1 November 2026.

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After 1 November 2026

Compatibility mode is switched off for every workspace on this date, and Speckle no longer offers it. New ACC sync and drag-and-drop uploads then use the new data format. Downstream tools that still expect the old format can break until they are updated. Existing models stay readable. Desktop connector publish and load are not turned off by this date.
Last modified on September 29, 2026