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UI_E_FP_OVERFLOW
The scope of UI_E_FP_OVERFLOW is Windows Animation Manager: animation arithmetic exceeded the representable floating-point range. Preserve 0x802A000B beside the returning call before cleanup or retry creates a more generic secondary failure.
Wrong turns
When it is returned, UI_E_PRIMITIVE_OUT_OF_BOUNDS is a timeline placement error; FP_OVERFLOW is representational arithmetic failure.
Do not merely clamp the final rendered value while leaving overflowing timing calculations intact.
Object and state boundary
When it is returned, Windows Animation is a stateful COM subsystem. During a this result investigation, animation variables, transitions and storyboards are created under a manager, scheduled against a monotonic animation time, updated before drawing, and eventually sealed or released. A visible glitch can therefore be downstream of a lifecycle, ownership, timeline, callback, or numeric contract failure.
During a this result investigation, transition parameters, durations, slopes, repetition counts, and caller-provided values can combine into extreme intermediates. The failure is numeric even when the visible symptom is a missing frame or unscheduled storyboard.
The first owner to inspect is the animation manager, storyboard, transition, timer, or callback that returned the HRESULT.
Capture before retry
| Capture | Diagnostic value |
|---|---|
| All numeric inputs in hexadecimal or full precision for this HRESULT. | This separates caller input from environment and service state and helps test the Windows Animation Manager boundary. |
| First nonfinite intermediate for this HRESULT. | This provides a stable comparison across retries or another machine and helps test the Windows Animation Manager boundary. |
| Duration and repetition configuration for this HRESULT. | This identifies the exact object or resource generation involved and helps test the Windows Animation Manager boundary. |
| Unit conversion and scaling path for this HRESULT. | This places the failure on the lifecycle or transaction timeline and helps test the Windows Animation Manager boundary. |
Controlled comparisons
| Control | Interpretation | Hold constant |
|---|---|---|
| Same input, fresh object or connection | If the result disappears, retained lifecycle or ownership state is implicated. | While diagnosing this result, keep the original data, account, device, or timeline parameters unchanged. |
| Same object, reduced operation | If the result follows one specific transition, statement, file, or ceremony step, the failure is localized. | While diagnosing this result, remove only unrelated work and keep the first failing boundary visible. |
| Same operation, controlled environment | If the result follows one machine, account, volume, network, or device, environment matters. | While diagnosing it, keep versions and identity explicit rather than comparing only the final message. |
Step-by-step investigation
The investigation should change one variable at a time and keep the original failing sample.
- First: Validate isfinite on every external numeric input.
- Next: Run with identity scale and moderate durations.
- Then: Separate unit conversion from transition construction.
- Finally: Add boundary tests around the largest supported value.
Closure criteria
Closure for this HRESULT requires the original supported range completes without overflow and deliberate out-of-range inputs fail before object construction; then repeat the next lifecycle operation to detect stale state.
Technical references
The references below define the API family or storage/protocol behavior used to interpret it.
- Microsoft: Windows Animation error codes
- Microsoft: IUIAnimationManager interface
- Microsoft: IUIAnimationTransition interface
- Microsoft: Windows Animation overview
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