Currently Orcapod passes any column handling errors directly to the user without much error message filtering. Rather, Orcapod ought to parse the error message and rethrow a message with more directed content so that the users can know what exactly they have to do. For this purpose, we'd want to have a collection of error messages that users encounter and the situation (e.g. code) that triggered it. Perhaps we can consider creating a place where such code/error message can be submitted.