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MSSIPOTF_E_STRUCTURE
A generic OpenType structural check failed
MSSIPOTF_E_STRUCTURE is the broadest structural status in this family. It says the checker found an inconsistency in the font representation but did not return a more precise code such as a bad offset, overlap, missing header, or checksum mismatch.
The absence of a specific subcode is important: avoid treating this as a permission, certificate, or rendering problem. Start with reproducibility and a table-level diagnostic. Once a detailed parser identifies an offending table or offset, use that finding rather than trying random binary edits that can invalidate checksums and signatures.
How to investigate
- Preserve the original artifact, its hash, and any full validator log before attempting conversion or repair.
- Run an independent format validator and list the table directory to obtain a more specific failure location.
- Repair from source and revalidate the entire font, including checksums and DSIG when present.
References
- Windows error-code reference
- OpenType font-file specification
- TTX inspection tool
- OpenType Sanitizer project
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