Describes the cause and action for error messages.
Error Message(English)：
if cell does not contain formula
How to evaluate this formula right in apache poi?
https://stackoverflow.com/questions/44366296/how-to-evaluate-this-formula-right-in-apache-poi
How to delete formula from xlsx file using poi?
https://stackoverflow.com/questions/35392744/how-to-delete-formula-from-xlsx-file-using-poi
FormulaEvaluator (POI API Documentation)
https://poi.apache.org/apidocs/dev/org/apache/poi/ss/usermodel/FormulaEvaluator.html
Unity-Excel-Importer-Maker/NPOI.OOXML.XML at master ・ tsubaki ...
https://github.com/tsubaki/Unity-Excel-Importer-Maker/blob/master/Assets/Terasurware/Editor/npoi/NPO・・・
ClosedXML.xml - Office 365. Assigned Licenses Report - Code - MSDN
https://code.msdn.microsoft.com/Office-365-Assigned-8c2eb22e/sourcecode?fileId=205103&pathId=9885391・・・
XSSFFormulaEvaluator (POI API Documentation)
http://tool.oschina.net/uploads/apidocs/apache-POI/org/apache/poi/xssf/usermodel/XSSFFormulaEvaluato・・・
How to delete formula from xlsx file using poi? - StackAnswers
https://stackanswers.net/questions/how-to-delete-formula-from-xlsx-file-using-poi