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MILERR_MALFORMED_GUIDELINE_DATA
MILERR_MALFORMED_GUIDELINE_DATA is a Windows Media Integration Layer (MIL) HRESULT. It indicates that guideline values are unsorted, contain NaN, or otherwise cannot be used for pixel alignment.
What to check for MILERR_MALFORMED_GUIDELINE_DATA
- Validate guideline arrays for finite values and strictly ordered coordinate sequences.
- Check layout calculations that can produce duplicate, reversed, or non-finite snapping positions.
- Recreate guideline data after changing DPI, transforms, or the target render size.
Microsoft documentation about WPF hardware-accelerated rendering
Diagnostic interpretation of MILERR_MALFORMED_GUIDELINE_DATA
MILERR_MALFORMED_GUIDELINE_DATA has the HRESULT value 0x8898008C. AllStat records the condition as “Guideline coordinates are not sorted properly or contain NaNs.”. For MILERR_MALFORMED_GUIDELINE_DATA, in practice, interpret that wording at the boundary owned by the Windows component or COM interface that returned the HRESULT, rather than treating the value as a generic Windows message.
Evidence to capture for MILERR_MALFORMED_GUIDELINE_DATA
- Record the exact COM method or Windows API, its input object, the calling thread, and the full 0x8898008C value before a wrapper converts it to an exception or Boolean result.
- Capture any IErrorInfo text, activity identifier, event-log entry, and subsystem trace that mentions MILERR_MALFORMED_GUIDELINE_DATA or the milerr / malformed / guideline / data operation.
- Preserve the first failure in the call chain; a later HRESULT can describe cleanup rather than the original milerr / malformed / guideline / data condition.
Retry and recovery for MILERR_MALFORMED_GUIDELINE_DATA
Retry MILERR_MALFORMED_GUIDELINE_DATA only when the owning API documents a transient state or after the condition described as “Guideline coordinates are not sorted properly or contain NaNs.” has changed. For MILERR_MALFORMED_GUIDELINE_DATA, configuration, policy, format, and authorization failures normally require correction first; an immediate loop can hide the original call site and add secondary errors.
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