A file is unreadable if its source has 0 records.
KB-20200501-01
Version
<XFRX 19.2.0
Cause
A table or a cursor has zero records or is empty after applying the filter.
Symptoms
Open XML SDK error messages:
Cannot open file: Part /xl/worksheets/Shete.xml. Root element is mssing.
File /xl/workbook.xml, The element has incomplete content.
File /docProps/app.xml, The element has incomplete content.
Workaround
None