What does HRESULT 0x88980089 (MILERR_GLYPHBITMAPMISSED) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: Required glyph bitmaps are missing from the Media Integration Layer glyph cache.

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MILERR_DEVICECANNOTRENDERTEXT	MILERR_MALFORMEDGLYPHCACHE

MILERR_GLYPHBITMAPMISSED

MILERR_GLYPHBITMAPMISSED is a Windows Media Integration Layer (MIL) HRESULT. It indicates that a glyph run references bitmap data that is not available in the cache used for rendering.

What to check

Rebuild or refresh the glyph run and its cache entries before rendering again.
Check font changes, device resets, and resource lifetime paths that can invalidate cached glyph bitmaps.
Avoid holding cache-dependent glyph data after the rendering device or text resource has been recreated.

Microsoft documentation about WPF hardware-accelerated rendering

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