If you are trying to move data from your project to a dataset and see "Error Message: head of empty stream", you may have hit a known bug. This error occurs on older versions of Domino when users try to create a dataset from a nested file. Please try moving the files to the top level of your project (to the /mnt directory), then retry to create the dataset. It should work once your specified directory is no longer nested. This bug is not present on newer versions of Domino, so please reach out to your account team if this is a major issue for you.