Err:509 Apr 2026
Skip to content

Dear Internet Explorer user: Your browser is no longer supported

Please switch to a modern browser such as Microsoft Edge, Mozilla Firefox or Google Chrome to view this website's content.

Code
Adam Dimech’s Coding Blog

Err:509 Apr 2026

In short: Calc expects an operator (like + , - , * , / ) between operands but finds something else instead. What Causes Error 509?

Two values or cell references are placed next to each other without an operator, such as =A1 B1 . Err:509

Fixing this error involves inspecting the formula bar for broken syntax. 1. Check Formula Syntax In short: Calc expects an operator (like +

Show you that frequently trigger this error Err:509

For a quick visual overview of common LibreOffice formula errors, including 509, you can view this educational video explanation . If you'd like, I can: