First of all again thanks for the great tooling really helps a lot.
I recently tried to rearrange some coolers again and found that rearrange fails when the provided view table is missing the name column.
This is due to the column being kept all NAs which is not compatible by the is_viewframe check. I'd suggest to either also just add a line to automatically fill the name column with the chromosome names (easiest fix in my mind) or to just put it in the documentation somewhere because there it only says BED-like which to me also is a BED3 file.
Best,
Daniel