Exception in GenerateSourceFolderE4 is not displayed.

[opcoach]

It is raised when there is a problem with src duplicate entry (see trace below).

Nothing is generated.

The workaround is to remove the src directories in the project's properties, restart Eclipse, and the set again the src directories in the properties.... Then generation is done.

!ENTRY org.eclipse.e4.ui.workbench 4 0 2021-03-26 23:31:54.778
!MESSAGE Command 'com.opcoach.genmodeladdon.generateSourceFolderE4' failed
!STACK 0
org.eclipse.core.commands.ExecutionException: Error executing 'com.opcoach.genmodeladdon.generateSourceFolderE4': Java Model Exception: Java Model Status [Build path contains duplicate entry: 'src' for project 'com.opcoach.crypto.wallet.core']
at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:170)
at org.eclipse.core.commands.Command.executeWithChecks(Command.java:488)
at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:487)
at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:213)
at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.executeItem(HandledContributionItem.java:438)
at org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem.handleWidgetSelection(AbstractContributionItem.java:449)
at org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem.lambda$2(AbstractContributionItem.java:475)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4441)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1512)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1535)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1520)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1324)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4227)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3837)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1157)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1046)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)
at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:644)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:551)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:156)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:152)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
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:401)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:653)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590)
at org.eclipse.equinox.launcher.Main.run(Main.java:1461)
Caused by: org.eclipse.e4.core.di.InjectionException: Java Model Exception: Java Model Status [Build path contains duplicate entry: 'src' for project 'com.opcoach.crypto.wallet.core']
at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:68)
at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:319)
at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:325)
at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:253)
at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:173)
at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:156)
... 35 more
Caused by: Java Model Exception: Java Model Status [Build path contains duplicate entry: 'src' for project 'com.opcoach.crypto.wallet.core']
at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:802)
at org.eclipse.jdt.internal.core.JavaProject.setRawClasspath(JavaProject.java:3608)
at org.eclipse.jdt.internal.core.JavaProject.setRawClasspath(JavaProject.java:3568)
at org.eclipse.jdt.internal.core.JavaProject.setRawClasspath(JavaProject.java:3624)
at com.opcoach.genmodeladdon.core.GenerateDevStructure.setFolderAsSourceFolder(GenerateDevStructure.java:230)
at com.opcoach.genmodeladdon.core.GenerateDevStructure.generateDevStructure(GenerateDevStructure.java:141)
at com.opcoach.genmodeladdon.core.GenerateDevStructure.generateDevStructure(GenerateDevStructure.java:130)
at com.opcoach.genmodeladdon.handlers.GeneratedDerivedSourceFolder.execute(GeneratedDerivedSourceFolder.java:63)
at com.opcoach.genmodeladdon.handlers.GenerateParentHandler.execute(GenerateParentHandler.java:23)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
... 40 more