Hi everyone. I'm writing a tool that can take a parameter with a dynamic list of values. The tool XML file looks like this: <conditional ...> <param name="outer" .... type="select"> <option value="1">XYZ</option> <option value="2">ZYX</option> <option value="3">ZXY</option> </param> <when value="1"> <param name="inner" .... type="select"> ... </param> </when> </conditional> I would like to generate the inner <option> elements dynamically by calling an external utility in response to the first parameter ("outer"), or at least some piece of python code. I know I can use <options> to load this from an external file, but that's not enough. I tried to use <code>, but I'm afraid I wasn't able to generate the list of options dynamically (by using the first conditional when selected). I couldn't find a tool that uses <code> to this end. Does anybody have any suggestion? I was thinking of adding a new attribute to <options>, like <options load_from_command="....">. Would you accept such a patch to galaxy? Thanks.