The error is something to the effect of "must have more than 1 dimension to create multi-index". This should be caught, wrapped in a human-friendly "You didn't have any useful files in this directory", and reraised. Thanks @phonghnguyen for finding this.
The error is something to the effect of "must have more than 1 dimension to create multi-index". This should be caught, wrapped in a human-friendly "You didn't have any useful files in this directory", and reraised. Thanks @phonghnguyen for finding this.