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MILERR_MALFORMEDGLYPHCACHE
MILERR_MALFORMEDGLYPHCACHE is a Windows Media Integration Layer (MIL) HRESULT. It indicates that glyph bitmaps in the cache have unexpected dimensions or an invalid representation.
What to check for MILERR_MALFORMEDGLYPHCACHE
- Discard and rebuild the glyph cache rather than continuing to use the malformed entries.
- Check font loading, glyph-cache ownership, and device reset handling for stale or corrupted resources.
- Capture font identity and rendering settings without logging user text or private document contents.
Microsoft documentation about WPF hardware-accelerated rendering
Diagnostic interpretation of MILERR_MALFORMEDGLYPHCACHE
MILERR_MALFORMEDGLYPHCACHE has the HRESULT value 0x8898008A. AllStat records the condition as “Some glyph bitmaps in glyph cache are unexpectedly big.”. For MILERR_MALFORMEDGLYPHCACHE, 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_MALFORMEDGLYPHCACHE
- Record the exact COM method or Windows API, its input object, the calling thread, and the full 0x8898008A 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_MALFORMEDGLYPHCACHE or the milerr / malformedglyphcache operation.
- For MILERR_MALFORMEDGLYPHCACHE, check the documented return contract of the specific API because the same HRESULT can require different recovery in different interfaces.
Retry and recovery for MILERR_MALFORMEDGLYPHCACHE
Retry MILERR_MALFORMEDGLYPHCACHE only when the owning API documents a transient state or after the condition described as “Some glyph bitmaps in glyph cache are unexpectedly big.” has changed. For MILERR_MALFORMEDGLYPHCACHE, 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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