org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.NullPointerException)

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Failed to execute runnable (java.lang.NullPointerException)
org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.NullPointerException)
at msi.gama.util.GAML.compileExpression(GAML.java:380)
at msi.gama.util.GAML.compileExpression(GAML.java:358)
at msi.gama.outputs.InspectDisplayOutput.(InspectDisplayOutput.java:246)
at ummisco.gama.ui.utils.SwtGui.lambda$7(SwtGui.java:351)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4024)
at msi.gama.application.Application.start(Application.java:42)
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 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:497)
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)

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