Simone, I'd look for a bug near line 352 in the SimState class, a call of an undefined method. // Bill From: Simone Gabbriellini <[log in to unmask]<mailto:[log in to unmask]>> Reply-To: MASON Multiagent Simulation Toolkit <[log in to unmask]<mailto:[log in to unmask]>> Date: Tuesday, September 9, 2014 at 11:10 AM To: "[log in to unmask]<mailto:[log in to unmask]>" <[log in to unmask]<mailto:[log in to unmask]>> Subject: Re: how to run without the UI Hi Bill, thanks for the reply, I did that but here's what I have: MASON Version 17. For further options, try adding ' -help' at end. Exception in thread "MASON Model: class sim.KSM.SimulationEnvironment" java.lang.RuntimeException: Exception occurred while trying to construct the simulation class sim.KSM.SimulationEnvironment java.lang.NoSuchMethodException: sim.KSM.SimulationEnvironment.<init>(long) at sim.engine.SimState$1.newInstance(SimState.java:352) at sim.engine.SimState.doLoop(SimState.java:539) at sim.engine.SimState.doLoop(SimState.java:342) at sim.KSM.SimulationEnvironment.main(SimulationEnvironment.java:587) any hint on what is happening? Best, Simone 2014-09-09 16:28 GMT+02:00 William G Kennedy <[log in to unmask]<mailto:[log in to unmask]>>: Simone, In NetBeans, under the run tab (not the icon), you'll find "Set Project Configuration". If there you select "Customize...", you'll be invited to select the main class. Our models are built with main classes with and without the GUI. To run without the GUI, you have to select the non-GUI main class. Good luck~ // Bill Kennedy From: Simone Gabbriellini <[log in to unmask]<mailto:[log in to unmask]>> Reply-To: MASON Multiagent Simulation Toolkit <[log in to unmask]<mailto:[log in to unmask]>> Date: Tuesday, September 9, 2014 at 9:57 AM To: "[log in to unmask]<mailto:[log in to unmask]>" <[log in to unmask]<mailto:[log in to unmask]>> Subject: how to run without the UI Dear List, I am developing my model in Netbeans. When I compile the project, I have a dist folder where myproject.jar and libraries are stored. If I double click the jar or start it from a terminal, it works fine and the UI is displayed correctly. I am not able, however, to run the model without UI. If I move to the classes folder (made by netbeans), and run java sim.KSM.SimulationEnvironment Error: unable to find or load main class sim.KSM.SimulationEnvironment Is there something I am missing here? Best, Simone -- ----------------------------------------------------------------- Simone Gabbriellini, PhD Post-doctoral Researcher ANR founded research project "DIFFCERAM" GEMASS, CNRS & Paris-Sorbonne. mobile: +39 340 39 75 626 email: [log in to unmask]<mailto:[log in to unmask]> -- ----------------------------------------------------------------- Simone Gabbriellini, PhD Post-doctoral Researcher ANR founded research project "DIFFCERAM" GEMASS, CNRS & Paris-Sorbonne. mobile: +39 340 39 75 626 email: [log in to unmask]<mailto:[log in to unmask]>