Hello, I am working on a tool that should load a set of selected files from a group folder. The interface should only display the files in the selected group folder. I tried to use the code below to read the files as options from an external .xml file in the tool-data directory based on the group selected in the first step but I run into 2 problems: - How can I pass the information from the parameter "group" to "from_file". - Even if I hardcode the xml file to be read from tool-data, the options do not show up. In the tool annotation profiler certain meta data of the input dataset are required for the options to be displayed but in my case I do not start without input dataset. <inputs> <page> <param name="group" type="select" label="Group" help="Select your group" > <option value="group1_files.xml">group1</option> <option value="group2_files.xml">group2</option> </param> </page> <page> <param name="selectedfiles" type="drill_down" display="checkbox" hierarchy="recurse" multiple="true" label="Choose files to upload" help=" " from_file="${group}"/> </page> </inputs> Thanks for your help in advance Tim