"Unsupported threads" error #466

New Issue

2016-09-07T15:10:34Z

dskrvk commented

2016-09-07 15:10:34 +00:00

(Migrated from github.com)

A customer-submitted xlsx file caused this error today thrown at xlsx/xlsx.js:9385, where MTRSettings is handled.

As far as I can tell from the format spec, this field is MTRSETTINGS: Multi-threaded Calculation Settings, and seems to only apply when calculating formulas, and shouldn't affect parsing.

Why is this an error? Does the library actually evaluate formulas (in addition to extracting them from cells)? Could the user provide an option to suppress evaluation, if not needed?

A customer-submitted xlsx file caused this error today thrown at [xlsx/xlsx.js:9385](https://github.com/SheetJS/js-xlsx/blob/master/xlsx.js#L9385), where `MTRSettings` is handled. As far as I can tell from the [format spec](http://www.digitalpreservation.gov/formats/digformatspecs/Excel97-2007BinaryFileFormat%28xls%29Specification.pdf), this field is MTRSETTINGS: Multi-threaded Calculation Settings, and seems to only apply when calculating formulas, and shouldn't affect parsing. Why is this an error? Does the library actually evaluate formulas (in addition to extracting them from cells)? Could the user provide an option to suppress evaluation, if not needed?

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