thisisnic commented on issue #10809:
URL: https://github.com/apache/arrow/issues/10809#issuecomment-888188222


   One more thing to note @JasperSch, though I'm not sure if it will be 
relevant to your particular case or not - the way the temporary directory has 
been set up in the example above using `tempdir()` actually gives you a 
session-specific temporary directory which may already have items in it, and so 
the call to `open_dataset()` will raise an error if these other files are there.
   
   If instead, you create a temporary directory like so:
   ```
   tf <- tempfile()
   dir.create(tf)
   ```
   you'll then end up with a completely empty temporary directory.  It may not 
be relevant here, but highlighting it just in case.


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