Describes the cause and action for error messages.
Error Message(English)：
error message begins with
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https://www.answers.com/Q/What_displays_to_indicate_a_cell_contains_an_error_message
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https://www.slideshare.net/vitorino87/c-o-basico
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Printed Documentation - Tharo Systems, Inc.
http://www.tharo.com/wp-content/uploads/pdfs/ELPrintable%20Docs/eldoc_english.doc
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https://m.open-open.com/pdf/782c65759f5a41ed844e8c7cda8490d6.html
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https://docplayer.net/3326665-Imanage-worksite-server-administrator-s-guide.html
Full text of "197709 Interface Age" - Internet Archive
https://archive.org/stream/197709InterfaceAge/197709%20Interface%20Age_djvu.txt
Open bugs in Paradox
http://hem.bredband.net/bertilisberg/paradox/openbugs.htm