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Fixed. The new Schedule was using an Object as its lock, and I'd forgotten that Objects aren't serializable or unique. I changed it to a boolean[1], just like SimState has. Thanks, Bruno. Sean On Oct 22, 2007, at 10:14 AM, Sean Luke wrote: > I'll poke around. My first guess is I forgot to set an inner > classs version number. > > Sean > > On Oct 22, 2007, at 8:32 AM, Bruno Van Den Bossche wrote: > >> Hello all, >> >> There seems to be a problem with making checkpoints in simulations >> with the current version in the CVS-repo. I attached the >> stacktrace (taken from trying to make a checkpoint when running >> the HeatBugs3D demo). >> >> It's just a java.io.NotSerializableException that pops up. But >> the trace doesn't really show much more usable info to track the >> problem down. >> >> Any ideas where it might go wrong? >> >> >> greetings >> Bruno >> >> -- >> Bruno Van Den Bossche >> [log in to unmask] >> http://www.ibcn.intec.UGent.be >> java.io.NotSerializableException: java.lang.Object >> at java.io.ObjectOutputStream.writeObject0(Unknown Source) >> at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source) >> at java.io.ObjectOutputStream.writeSerialData(Unknown Source) >> at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) >> at java.io.ObjectOutputStream.writeObject0(Unknown Source) >> at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source) >> at java.io.ObjectOutputStream.writeSerialData(Unknown Source) >> at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) >> at java.io.ObjectOutputStream.writeObject0(Unknown Source) >> at java.io.ObjectOutputStream.writeObject(Unknown Source) >> at sim.engine.SimState.writeToCheckpoint(SimState.java:218) >> at sim.engine.SimState.writeToCheckpoint(SimState.java:231) >> at sim.display.Console.doSaveAs(Console.java:1752) >> at sim.display.Console$40$1.run(Console.java:903) >> at sim.display.Console.doChangeCode(Console.java:2471) >> at sim.display.Console$40.actionPerformed(Console.java:899) >> at javax.swing.AbstractButton.fireActionPerformed(Unknown Source) >> at javax.swing.AbstractButton$Handler.actionPerformed(Unknown >> Source) >> at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown >> Source) >> at javax.swing.DefaultButtonModel.setPressed(Unknown Source) >> at javax.swing.AbstractButton.doClick(Unknown Source) >> at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source) >> at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased >> (Unknown Source) >> at java.awt.Component.processMouseEvent(Unknown Source) >> at javax.swing.JComponent.processMouseEvent(Unknown Source) >> at java.awt.Component.processEvent(Unknown Source) >> at java.awt.Container.processEvent(Unknown Source) >> at java.awt.Component.dispatchEventImpl(Unknown Source) >> at java.awt.Container.dispatchEventImpl(Unknown Source) >> at java.awt.Component.dispatchEvent(Unknown Source) >> at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) >> at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) >> at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) >> at java.awt.Container.dispatchEventImpl(Unknown Source) >> at java.awt.Window.dispatchEventImpl(Unknown Source) >> at java.awt.Component.dispatchEvent(Unknown Source) >> at java.awt.EventQueue.dispatchEvent(Unknown Source) >> at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown >> Source) >> at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) >> at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown >> Source) >> at java.awt.EventDispatchThread.pumpEvents(Unknown Source) >> at java.awt.EventDispatchThread.pumpEvents(Unknown Source) >> at java.awt.EventDispatchThread.run(Unknown Source) >