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    <title>topic Extending designer: random error Nullpointer in Alfresco Archive</title>
    <link>https://connect.hyland.com/t5/alfresco-archive/extending-designer-random-error-nullpointer/m-p/118576#M83643</link>
    <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;Hi all, &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;i'm trying to extend the editor with some task that i've to implment.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;The problem is that sometimes it works, sometimes i have this error:&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;PRE class="language-none line-numbers"&gt;&lt;CODE&gt;&lt;BR /&gt;Problems occurred when invoking code from plug-in: "org.eclipse.jface".&lt;BR /&gt;&lt;BR /&gt;&lt;BR /&gt;java.lang.NullPointerException&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:3095)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.ui.internal.WorkbenchPage.access$22(WorkbenchPage.java:3003)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.ui.internal.WorkbenchPage$8.run(WorkbenchPage.java:2985)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2981)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2940)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2931)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.ui.ide.IDE.openEditor(IDE.java:655)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.ui.ide.IDE.openEditor(IDE.java:614)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:360)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:167)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:249)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:228)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:275)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:251)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.jdt.internal.ui.packageview.PackageExplorerActionGroup.handleOpen(PackageExplorerActionGroup.java:376)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$4.open(PackageExplorerPart.java:538)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.ui.OpenAndLinkWithEditorHelper$InternalListener.open(OpenAndLinkWithEditorHelper.java:48)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:866)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:864)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1152)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:1256)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:275)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:269)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:309)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4134)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1458)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1481)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1466)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1271)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3980)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3619)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1029)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:923)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:588)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at java.lang.reflect.Method.invoke(Method.java:597)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)&lt;BR /&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.equinox.launcher.Main.run(Main.java:1438)&lt;BR /&gt;&lt;SPAN class="line-numbers-rows"&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;/SPAN&gt;&lt;/CODE&gt;&lt;/PRE&gt;&lt;BR /&gt;&lt;SPAN&gt;this is the code i'm using: &lt;/SPAN&gt;&lt;A href="https://github.com/esseti/CroCo-Activiti-Task-UIs" rel="nofollow noopener noreferrer"&gt;https://github.com/esseti/CroCo-Activiti-Task-UIs&lt;/A&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;PS: the editor wants to have access to the task implementation? beacuse i've to separated projects, so in the designer i just put the task classes.&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;ciao.&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
    <pubDate>Fri, 21 Jun 2013 16:41:26 GMT</pubDate>
    <dc:creator>esseti</dc:creator>
    <dc:date>2013-06-21T16:41:26Z</dc:date>
    <item>
      <title>Extending designer: random error Nullpointer</title>
      <link>https://connect.hyland.com/t5/alfresco-archive/extending-designer-random-error-nullpointer/m-p/118576#M83643</link>
      <description>Hi all, i'm trying to extend the editor with some task that i've to implment.The problem is that sometimes it works, sometimes i have this error&lt;IMG id="smileytongue" class="emoticon emoticon-smileytongue" src="https://migration33.stage.lithium.com/i/smilies/16x16_smiley-tongue.png" alt="Smiley Tongue" title="Smiley Tongue" /&gt;roblems occurred when invoking code from plug-in: "org.eclipse.jface".java.lang.NullPointerException&amp;nbsp;&amp;nbsp;&amp;nbsp;at org.eclipse.ui.internal.WorkbenchPage.busyOpenEd</description>
      <pubDate>Fri, 21 Jun 2013 16:41:26 GMT</pubDate>
      <guid>https://connect.hyland.com/t5/alfresco-archive/extending-designer-random-error-nullpointer/m-p/118576#M83643</guid>
      <dc:creator>esseti</dc:creator>
      <dc:date>2013-06-21T16:41:26Z</dc:date>
    </item>
    <item>
      <title>Re: Extending designer: random error Nullpointer</title>
      <link>https://connect.hyland.com/t5/alfresco-archive/extending-designer-random-error-nullpointer/m-p/118577#M83644</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;Moved to designer forum.&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Wed, 26 Jun 2013 17:26:04 GMT</pubDate>
      <guid>https://connect.hyland.com/t5/alfresco-archive/extending-designer-random-error-nullpointer/m-p/118577#M83644</guid>
      <dc:creator>jbarrez</dc:creator>
      <dc:date>2013-06-26T17:26:04Z</dc:date>
    </item>
    <item>
      <title>Re: Extending designer: random error Nullpointer</title>
      <link>https://connect.hyland.com/t5/alfresco-archive/extending-designer-random-error-nullpointer/m-p/118578#M83645</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;This looks like some conflict between JDT and Designer when using the "link with editor" button in the project explorer. Can you test for us whether turning off that option solves the problem? It would help track down the problem, if we can do anything about it.&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Thu, 27 Jun 2013 18:48:50 GMT</pubDate>
      <guid>https://connect.hyland.com/t5/alfresco-archive/extending-designer-random-error-nullpointer/m-p/118578#M83645</guid>
      <dc:creator>tiesebarrell</dc:creator>
      <dc:date>2013-06-27T18:48:50Z</dc:date>
    </item>
    <item>
      <title>Re: Extending designer: random error Nullpointer</title>
      <link>https://connect.hyland.com/t5/alfresco-archive/extending-designer-random-error-nullpointer/m-p/118579#M83646</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;hello.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;actually i don't have the problem anymore. i think it may be related with the icon of a task that i made. Icon that was not 16x16. may that be the case?&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Mon, 08 Jul 2013 08:57:46 GMT</pubDate>
      <guid>https://connect.hyland.com/t5/alfresco-archive/extending-designer-random-error-nullpointer/m-p/118579#M83646</guid>
      <dc:creator>esseti</dc:creator>
      <dc:date>2013-07-08T08:57:46Z</dc:date>
    </item>
    <item>
      <title>Re: Extending designer: random error Nullpointer</title>
      <link>https://connect.hyland.com/t5/alfresco-archive/extending-designer-random-error-nullpointer/m-p/118580#M83647</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;Could be, but from that particular stacktrace it seems unlikely.&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Tue, 09 Jul 2013 12:14:03 GMT</pubDate>
      <guid>https://connect.hyland.com/t5/alfresco-archive/extending-designer-random-error-nullpointer/m-p/118580#M83647</guid>
      <dc:creator>tiesebarrell</dc:creator>
      <dc:date>2013-07-09T12:14:03Z</dc:date>
    </item>
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