What does HRESULT 0x80097009 (MSSIPOTF_E_TABLES_OVERLAP) mean?

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Declared table ranges overlap, so the font cannot assign bytes to each table safely.

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MSSIPOTF_E_BAD_FIRST_TABLE_PLACEMENT	MSSIPOTF_E_TABLE_PADBYTES

MSSIPOTF_E_TABLES_OVERLAP

Two table records claim the same bytes

MSSIPOTF_E_TABLES_OVERLAP is reported when declared table ranges intersect. In a normal OpenType layout, a record identifies a table using an offset and length; adjacent tables may be separated by a small padding gap, but one table must not consume bytes declared for another.

A shared table in a TrueType Collection is not automatically an overlap error: collection directories may deliberately reference shared table data. The relevant question is whether the particular validation context and directory rules allow that reference. For a normal single-font file, intersecting ranges are a strong sign of a bad offset or length.

How to investigate

Sort records by offset and compare each range end with the next range start.
Verify the collection index and directory when working with .ttc/.otc files.
Repair the producer’s layout calculation; moving one table also changes offsets, checksums, and signatures downstream.

References

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