Resolving timeline warning or errors in Autodesk Fusion

2026-03-14

Technical Support

Issue:

When working in a parametric timeline environment in Autodesk Fusion, updating a design causes timeline warnings highlighted in yellow, and errors in red. This can cause downstream features to lose references.

Autodesk Fusion: Timeline warning

Causes:

The source geometry referenced by features further down the timeline has lost association.

Solution:

Compute features to reveal any warnings or errors

Perform a Compute All (Command + B or Ctrl + B) to compute all features in the timeline. This should trigger any warnings or errors.
It is a good practice to run this command before saving a design as it may reveal timeline errors.

Manually resolve warnings or errors in the timeline

Right click the feature in the timeline marked in yellow to obtain more information about the nature of the error.
Select Review Warning.

Note: The results will provide some clue as to the nature of the warning or error. In the following example, a sketch profile that the Extruded feature was using is no longer available:

To resolve the issue it is necessary to edit the feature in the timeline and perform some edits. These edits will be unique to the design and warning/error.

Autodesk Fusion: Warning message for missing references.

Remove the timeline or recreate the model

If it's not possible to review each warning or error, you can remove the timeline all together or start fresh in a new design:

Export the design as a STEP file and import the file back into Fusion. This will bring in the basic model without a timeline or sketch features.
Turn off the timeline by enabling direct modeling: How to switch between direct and parametric modeling in Fusion.
Recreate the design with or without a timeline. This suggestion can help create a clean model where timeline warnings or errors can be addressed throughout the modeling process.

Products:

Fusion;