Err:509

Moving a document from Excel to LibreOffice that uses functions unsupported or interpreted differently by Calc, such as some named expressions. How to Fix Error 509

Writing 2(A1+B1) instead of 2*(A1+B1) . Calc requires the explicit asterisk operator. Err:509

Sometimes, copying formula text from another application can introduce hidden, illegal characters. Re-typing the formula often resolves this. 4. Correct Function Structure Moving a document from Excel to LibreOffice that