Describes the cause and action for error messages.
Error Message(English)：
turn off error checking
https://www.youtube.com/watch?v=jcave0jA1ZU
Turn Off Error Checking in Microsoft Excel - YouTube
https://www.youtube.com/watch?v=HckL3aNgUSk
https://www.youtube.com/watch?v=HckL3aNgUSk
Remove Error Checking Green Triangles from Excel - YouTube
https://www.youtube.com/watch?v=PfbZmH-AMYk
https://www.youtube.com/watch?v=PfbZmH-AMYk
Fix text-formatted numbers by applying a number format - Excel
https://support.office.com/en-ie/article/fix-text-formatted-numbers-by-applying-a-number-format-6599・・・
What Excel's Red and Green Triangle Indicators Mean - Lifewire
https://www.lifewire.com/excels-red-and-green-triangle-indicators-3124031
:: View topic - How to turn off error checking green triangles in ...
http://www.shamskm.com/forum/viewtopic.php?p=14730&sid=26723a8408dbb5f41a606e8b2c5104ca
Error Checking In Microsoft Excel 2003 ~ Microsoft Office Support
http://msofficesupport.blogspot.com/2011/04/error-checking-in-microsoft-excel-2003.html