General
Unavailable data type
The #UNKNOWN! error indicates an unknown data type that is not currently supported in this version of Excel. If you need to work with this data type, consider upgrading to a newer version of Office.
Python in Excel
Unavailable data type
This data type is not currently supported in this version of Excel. For more information, see Python in Excel availability.
Unknown value
The value returned from an external code service does not adhere to the expected schema.
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