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Fixed in 6000.0.33f1
Fixed in 6000.1.0a9
Votes
1
Found in
6000.0.32f1
6000.1.0a8
Issue ID
UUM-91579
Regression
No
ArgumentException is thrown and reference is missing when deserializing and using MultiColumnListView
Reproduction steps:
1. Open the attached “Hopeful Dumpster Fire.zip” project
2. Open the “Assets/BugReport/Document.uxml“ file in the UI builder
3. Select the MultiColumnListView element in the Hierarchy pane
4. Navigate to Attributes > Columns > Columns in the UI Builder Inspector pane
5. Assign CellView.uxml to the Cell Template field
6. Save (CTRL+S) and close the UI Builder
7. Select the Assets/BugReport folder and reimport it (Right Click > Reimport)
8. Open the “Assets/BugReport/Document.uxml“ file in the UI builder
9. Observe the Console window and UI Builder Cell Template field
Expected result: No errors are thrown and the reference is retained
Actual result: “ArgumentException: Object of type 'UnityEngine.Object' cannot be converted to type 'UnityEngine.UIElements.VisualTreeAsset'.” error is thrown and the reference is missing
Reproducible with: 6000.0.32f1, 6000.1.0a8
Couldn't test with: 2021.3.47f1 (Could not resolve compilation errors), 2022.3.55f1 (no columns attribute)
Reproducible on: Windows 11
Not reproducible on: No other environment tested
Comments (2)
-
badxpioneer2013
Feb 13, 2026 18:53
The bug still exists in 6000.3.5f2. The only workaround is manually removing the item-template property from the UXML file.
-
Yishar
Jan 22, 2026 17:41
This is still not fixed in 6000.3.3f1
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Resolution Note (fix version 6000.0.33f1):
Fixed by https://issuetracker.unity3d.com/product/unity/issues/guid/UUM-90739
Resolution Note (fix version 6000.1.0a9):
Fixed by https://issuetracker.unity3d.com/product/unity/issues/guid/UUM-90739