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This is the first problem you are going to need to address and is most likely caused by a bad project configuration:

Caused by: java.lang.ClassFormatError: Duplicate method name&signature in class file sim/util/media/chart/XYChartGenerator

Since I don't have the project in front of me the best advice I can offer is to avoid using the MASON .java files directly and just reference the JAR instead.

Little red X next to components can have a lot of meanings - would need to see the details since that could be anything from a syntax error to referencing a class that Eclipse can't find.

On Mon, Mar 19, 2018 at 3:14 PM, Peter Gacs <[log in to unmask]> wrote:
> What were the errors you got from Eclipse?

Little red x next to many components.

Also, when I try to run the Console I get a warning about errors.  I am bringing it up anyway, and
try to run, say, Ant Foraging.  I get the following trace:

java.lang.reflect.InvocationTargetException
        at java.awt.EventQueue.invokeAndWait(EventQueue.java:1307)
        at java.awt.EventQueue.invokeAndWait(EventQueue.java:1282)
        at javax.swing.SwingUtilities.invokeAndWait(SwingUtilities.java:1348)
        at sim.display.Console.launchClass(Console.java:1958)
        at sim.display.Console.doNew(Console.java:2090)
        at sim.display.Console.main(Console.java:1726)
Caused by: java.lang.ClassFormatError: Duplicate method name&signature in class file sim/util/media/chart/XYChartGenerator
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:344)
        at sim.portrayal.inspector.PropertyInspector.getPopupMenu(PropertyInspector.java:213)
        at sim.portrayal.SimpleInspector.generateProperties(SimpleInspector.java:253)
        at sim.portrayal.SimpleInspector.<init>(SimpleInspector.java:67)
        at sim.portrayal.SimpleInspector.<init>(SimpleInspector.java:98)
        at sim.portrayal.SimpleInspector.<init>(SimpleInspector.java:90)
        at sim.portrayal.Inspector.getInspector(Inspector.java:96)
        at sim.display.GUIState.getInspector(GUIState.java:239)
        at sim.display.Console.buildModelInspector(Console.java:1180)
        at sim.display.Console.<init>(Console.java:968)
        at sim.display.GUIState.createController(GUIState.java:147)
        at sim.display.Console$52.run(Console.java:1958)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:301)
        at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:744)
        at java.awt.EventQueue.access$400(EventQueue.java:97)
        at java.awt.EventQueue$3.run(EventQueue.java:697)
        at java.awt.EventQueue$3.run(EventQueue.java:691)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:714)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)