Hi Everyone, I'm new to using Mason although I've been using Repast and NetLogo for awhile. I really like Mason's separation of the code for the simulation versus the visualization and decided to use it for a new project I'm working on. I've worked through the tutorials, how-to's, and archives and have a question about basic design. What is the cleanest way to have the number of ticks the schedule is to run be a parameter that is set by the user either in the GUI interface or from a command-line call to the simulation? Would it be better to write my own doLoop (ala, tutorial 1/2) or would is there a way to cleanly use the doLoop method in your main but have the number of ticks passed by the command-line call or by the GUI? Thanks! Mark Mark E. McBride Professor and Director of Graduate Studies Department of Economics 208 Laws Hall - Miami University Oxford, OH 45056 513 529-2864 email: [log in to unmask] IM: mcbridme http://mcbridme.sba.muohio.edu/