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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.
Diagnostic discriminator: Record the exact guideline sequence before submission and compare it with a finite, strictly ordered control. A failure that follows duplicate, reversed, or NaN coordinates identifies layout-data generation rather than renderer availability.
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
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