quinnj commented on issue #344:
URL: https://github.com/apache/arrow-julia/issues/344#issuecomment-1276806875

   Sorry, can you clarify what is going on here? Are you saying you have 
columns in `df` (I assume that's a DataFrame?) that have different lengths? 
i.e. `col1` has 10 rows, while `col2` has 12 rows or something?
   
   The codepath you're hitting here seems to suggest that a column in your 
DataFrame is actually a column of Array objects? Are you sure you don't have an 
element that is something like `[#undef]` which would result in this error? If 
you can provide a reproducible example, we can probably fix it really quickly.


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