Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Solutions on the web

via GitHub by agrignard
, 1 year ago
This exception has no message.
java.lang.NullPointerException: 	at msi.gama.metamodel.topology.grid.GamaSpatialMatrix.dispose(GamaSpatialMatrix.java:117)	at msi.gama.metamodel.topology.grid.GridTopology.dispose(GridTopology.java:270)	at msi.gama.metamodel.population.GamaPopulation.dispose(GamaPopulation.java:272)	at msi.gama.metamodel.agent.GamlAgent.dispose(GamlAgent.java:209)	at msi.gama.kernel.simulation.SimulationAgent.dispose(SimulationAgent.java:312)	at msi.gama.metamodel.population.GamaPopulation.killMembers(GamaPopulation.java:616)	at msi.gama.metamodel.population.GamaPopulation.dispose(GamaPopulation.java:268)	at msi.gama.kernel.simulation.SimulationPopulation.dispose(SimulationPopulation.java:109)	at msi.gama.kernel.experiment.ExperimentAgent.closeSimulations(ExperimentAgent.java:157)	at msi.gama.kernel.experiment.ExperimentAgent.dispose(ExperimentAgent.java:177)	at msi.gama.kernel.experiment.ExperimentPlan.dispose(ExperimentPlan.java:199)	at msi.gama.kernel.experiment.ExperimentController.closeExperiment(ExperimentController.java:266)	at msi.gama.kernel.experiment.ExperimentController.close(ExperimentController.java:256)	at msi.gama.runtime.GAMA.closeAllExperiments(GAMA.java:173)	at msi.gama.runtime.GAMA.runGuiExperiment(GAMA.java:89)	at msi.gama.lang.gaml.ui.utils.ModelRunner.runModel(ModelRunner.java:96)	at msi.gama.lang.gaml.ui.utils.ModelRunner.runModel(ModelRunner.java:136)	at msi.gama.lang.gaml.ui.editor.toolbar.OpenExperimentSelectionListener.widgetSelected(OpenExperimentSelectionListener.java:62)	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:248)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4230)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1491)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1514)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1499)	at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1299)	at ummisco.gama.ui.controls.FlatButton.doButtonClicked(FlatButton.java:144)	at ummisco.gama.ui.controls.FlatButton.handleEvent(FlatButton.java:103)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4230)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1491)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1514)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1499)	at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1299)	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4072)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3698)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1127)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1018)	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:694)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:606)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)	at msi.gama.application.Application.start(Application.java:43)	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:669)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608)	at org.eclipse.equinox.launcher.Main.run(Main.java:1515)	at org.eclipse.equinox.launcher.Main.main(Main.java:1488)