Sorry I should have provided more detail. After I have executed my tool, I write the html into the dataset_'id'.dat file listing all the output files which I store in extra_files_path (named as dataset_id_files in the database). Thus when I do a download I only want the files stored in "dataset_id_files" downloaded I don't want/need dataset_'id'.dat, too. Can I stop dataset_id.dat from being included in the zip file? I was thinking I may need to change "act_on_multiple_datasets" in ~./lib/galaxy/webapps/galaxy/controllers/library_common.py . However, it doesn't seem that this function is called when you click on the download icon on the "history" panel. Thanks Neil From: Burdett, Neil (CCI, Herston - RBWH) Sent: Friday, 10 January 2014 1:46 PM To: galaxy-dev@lists.bx.psu.edu Subject: how to stop extra html file inserted into download zip Hi, I have a tool that works well. However, when I download the results, the results are zipped up but included into the zip file is the *.html file (with the same name as the tool output) do you know how I can stop this from being zipped up? Thanks Neil