Which of the following is not a valid way to read multiple datasets from a single reader?

• A. Provide a comma-delimited list of files
• B. Click the drop-down and choose Select Multiple Folders/Files.
• C. Ctrl+ or Shift+click on Windows (or Cmd+ or Shift+click on Mac) when using the File Browser.
• D. File > Open > open multiple datasets

Answer: (A)

Reading multiple datasets with one reader relies on the reader accepting multiple inputs through the UI. In FME, you can select several files or folders in the File Browser using multi-select (hold Ctrl or Shift on Windows, or Cmd or Shift on Mac). You can also use the drop-down option to choose Select Multiple Folders/Files, or use File > Open to open multiple datasets at once. These approaches feed the reader a list of datasets to process together.

A comma-delimited list of files isn’t a valid way to specify multiple inputs for this reader because the dataset path field isn’t designed to parse and expand a single string of paths separated by commas into multiple datasets. It expects either a single path or a set of paths provided through the UI’s multi-select mechanisms.