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When editing a CheatSheet the button "Register this cheet sheet" opens a window where you can enter a (new) category and a description. When doing so and then clicking "Finish" a popup "Problem Occured" comes up saying "java.lang.NullPointerException". (no more details) The cheat sheet is not registered after this.
I'm afraid I cannot reproduce it. Could you please try to see if there is something logged in the 'Error Log' view?
Thanks to the "Error log" view hint here is some more info: Exception Stack Trace: java.lang.NullPointerException at org.eclipse.pde.internal.ui.wizards.cheatsheet.RegisterCSOperation.execute(RegisterCSOperation.java:78) at org.eclipse.ui.actions.WorkspaceModifyOperation$1.run(WorkspaceModifyOperation.java:104) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1800) at org.eclipse.ui.actions.WorkspaceModifyOperation.run(WorkspaceModifyOperation.java:116) at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:464) at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:372) at org.eclipse.jface.wizard.WizardDialog.run(WizardDialog.java:934) at org.eclipse.pde.internal.ui.wizards.cheatsheet.RegisterCSWizard.performFinish(RegisterCSWizard.java:60) at org.eclipse.jface.wizard.WizardDialog.finishPressed(WizardDialog.java:742) at org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDialog.java:373) at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:624) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:228) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3823) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3422) at org.eclipse.jface.window.Window.runEventLoop(Window.java:825) at org.eclipse.jface.window.Window.open(Window.java:801) at org.eclipse.pde.internal.ui.editor.cheatsheet.CSAbstractEditor.handleLinkActivatedRegisterCS(CSAbstractEditor.java:117) at org.eclipse.pde.internal.ui.editor.cheatsheet.CSAbstractEditor.access$3(CSAbstractEditor.java:107) at org.eclipse.pde.internal.ui.editor.cheatsheet.CSAbstractEditor$2.linkActivated(CSAbstractEditor.java:71) at org.eclipse.ui.forms.widgets.AbstractHyperlink.handleActivate(AbstractHyperlink.java:228) at org.eclipse.ui.forms.widgets.ImageHyperlink.handleActivate(ImageHyperlink.java:177) at org.eclipse.ui.forms.widgets.AbstractHyperlink.handleMouseUp(AbstractHyperlink.java:322) at org.eclipse.ui.forms.widgets.AbstractHyperlink.access$2(AbstractHyperlink.java:306) at org.eclipse.ui.forms.widgets.AbstractHyperlink$4.handleEvent(AbstractHyperlink.java:120) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3823) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3422) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2384) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2348) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2200) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:495) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:490) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:386) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504) at org.eclipse.equinox.launcher.Main.run(Main.java:1236) Session Data: eclipse.buildId=M20090211-1700 java.version=1.6.0_13 java.vendor=Sun Microsystems Inc. BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=de_DE Framework arguments: 256M Command-line arguments: -os win32 -ws win32 -arch x86 256M -data D:\home\osswald2\SCHUNK\SDH2\SDHLibrary This is a continuation of log file D:\home\osswald2\SCHUNK\SDH2\SDHLibrary\.metadata\.bak_2.log Created Time: 2009-04-17 20:33:33.937
OK, thanks! I can easily reproduce on 3.5: the error occurs when the project containing the Cheatsheet is not a Plug-in project...
Created attachment 132666 [details] Patch Don't add the "register this cheatsheet" action in the toolbar if the current project is not a plug-in project... Trivial enough for an inclusion in M7 IMO
Created attachment 132667 [details] mylyn/context/zip
done. > 20090421 In the future, we may want to consider moving this logic up the chain.
