I've found not documentation around any name formatting limitations for Attributes for the Hyper file Writer. When I work in Tableau Prep, I have no issues writing a file with a field name like "Budget$" to a hyper file. I've found in FME that when writing to an Excel file, it also takes such a name, but when using the Hyper writer, it drops the "$" and replaces it with underscore "_". Why is it doing this? Is this a mistake in creating the code for the Writer or is it a Necessity and if it is a necessity, shouldn't this be documented?

