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ok... but could you please be more specific: which argument should be changed `security=`, `options=` or something else?

Helpdesk said that they don't support programming languages...

@JanMarvin thanks for the efforts, but I see no change after the fix. It is still formatted as `mm.dd.yyyy`. But if I set `options("openxlsx.dateFormat" = "date")` I get expected output...

I'm sorry, you are right. I have rebuild it in a clean new session and it works now. Although I have this warnings in the end: ```r Warning messages: 1:...

So, the issue is still here. When I confirmed that it was solved, I have run the code with the option. Without this option in the code there is no...

I'm using `openxlsx * 4.2.5.9000 2022-07-07 [1] Github (ycphs/openxlsx@3ceeb84)`

My fault. I thought that the main branch here is the development one. Now I realized that I have to use `remotes::install_github("ycphs/openxlsx", ref = "development")` to have the development version....

@talalvas could you show an example how to implement `xloil.CellError.NA` ?