I have two sets of files which contain different information from an assay run for different dates. I am trying to read them in a loop and manipulate both files and join the columns together to one final table. I’m getting a stack issue I’m guessing because there is no information that they are indexed the same. I’m sure this has been done and I’m making some trivial mistake. Any help would be greatly appreciated. I’ve attached a png of the beginning of the flow.