Hi Again Galaxy team. I'm attempting to use the new workflow API, which I understand is still in development. I created a test workflow with a single input, and was able to use 'example_watch_folder.py' to successfully execute it as a history and get the output to a specified location. My question is how I can modify the script to accept multiple inputs (i.e. how do I define which files in the input folder I want to be each input) and if there's a way to specify runtime parameters. For instance, the workflow I want to execute has a filter step on a tabular input item as one of the later steps which needs to be defined at runtime. How would I specify this in the 'watch_folder.py' parameters? or is this not possible yet? FYI, I know perl but not python, so ultimately I want to wrap the python scripts into a larger perl script to execute recursive workflows. Thanks for all your help. Galaxy is an amazing tool and the workflow API is a fantastic improvement. Simon Simon Lank Research Specialist O'Connor Lab, WNPRC 555 Science Dr. Madison WI (608) 265-3389