EML 2 Dataset requires File Extension Filter parameter
I'm not 100% sure this isn't just a lack of documentation. When using EML 2 Dataset on a compressed data table (so using the As UnCompressed File Name Data Output Format), EML 2 Dataset will not function properly without a value in the File Extension Filter parameter. There does not seem to be a way to get all the files, regardless of extension, nor does there seem to be a way to get multiple extension types.
Personally, I'd be happy if the actor returned all files if the File Extension Parameter is blank.