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Won't Fix
Won't Fix in 6000.4.X, 6000.5.X, 6000.6.X
Votes
0
Found in
6000.3.0f1
6000.4.0a5
6000.5.0a2
6000.6.0a1
Issue ID
UUM-129710
Regression
No
Error "Internal_SetPosition can only be called from the main thread." is present when using TransformHandle in main thread
Reproduction steps:
1. Open the attached project "ReproProj"
2. Open the “/Assets/Main Scene.unity” Scene
3. Enter the Play Mode
4. Observe the Console
Expected result: No Errors exist and the Cube moves up and down
Actual result: Error "Internal_SetPosition can only be called from the main thread." is present
Reproducible with: 6000.3.0f1, 6000.4.0a5, 6000.5.0a2
Could not test with: 6000.0.63f1, 6000.2.14f1 (Assets\UserAssembly\SampleComponent.cs(24,12): error CS0246: The type or namespace name 'TransformHandle' could not be found)
Reproducible on:
Play Mode
Not reproducible on:
Windows Standalone Player
Testing environment: Windows 10 Enterprise 21H2
Not reproducible on: No other environment tested
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Resolution Note:
Thank you for reporting a bug to Unity.
In this case the behavior was deemed not to be a bug and is job safety behaving normally. TransformHandle methods are not allowed to work in jobs, there is some patching of special job types (IJobEntity) to automatically run on the main thread outside of the job system, but this is an exception and we are aiming to make job behavior as standard as possible between the different job types.
We are introducing a new Transform job type (TransformRef) for jobs in an upcoming Unity release (check out the 2026 Core Engine GDC roadmap for more details).
Resolution Note (6000.6.X):
Thank you for reporting a bug to Unity.
In this case the behavior was deemed not to be a bug and is job safety behaving normally. TransformHandle methods are not allowed to work in jobs, there is some patching of special job types (IJobEntity) to automatically run on the main thread outside of the job system, but this is an exception and we are aiming to make job behavior as standard as possible between the different job types.
We are introducing a new Transform job type (TransformRef) for jobs in an upcoming Unity release (check out the 2026 Core Engine GDC roadmap for more details).
Resolution Note (6000.5.X):
Thank you for reporting a bug to Unity.
We have reviewed the issue carefully, and in this case, the team is unable to prioritize fixing this bug. There are a number of reasons we make this decision, including the impact and severity of the issue across our user and customer base, and the possibility that future plans may solve the problem in a different way, or that a workaround for the bug may be available.
Today we will be closing this case. Thank you again for taking the time to report this issue, and please let us know if there is anything else that changes the impact or severity of this issue.
Resolution Note (6000.4.X):
Thank you for reporting a bug to Unity.
We have reviewed the issue carefully, and in this case, the team is unable to prioritize fixing this bug. There are a number of reasons we make this decision, including the impact and severity of the issue across our user and customer base, and the possibility that future plans may solve the problem in a different way, or that a workaround for the bug may be available.
Today we will be closing this case. Thank you again for taking the time to report this issue, and please let us know if there is anything else that changes the impact or severity of this issue.