Two things to possibly improve the errors:
- When trying to load a data file that's missing on the drive, it complains of "unknown data type" instead of saying the file is missing.
- Very specific, so possibly not worth spending time on it, but a user ran into an issue after having created custom events with their own code, and the event labels were mistakenly of "string" type instead of "char". Later, when trying to import epochs around those events, it would silently fail because of file name creation problems, where strings would not concatenate properly (it would become a string array instead of a single char name) and subsequent functions to validate and make the name unique would fail and eventually just return "____".