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org.eclipse.swt.SWTException: Invalid thread access
  at org.eclipse.swt.SWT.error(SWT.java:3884)
  at org.eclipse.swt.SWT.error(SWT.java:3799)
  at org.eclipse.swt.SWT.error(SWT.java:3770)
  at org.eclipse.swt.widgets.Widget.error(Widget.java:616)
  at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:463)
  at org.eclipse.swt.widgets.Tree.getItemCount(Tree.java:1526)
  at org.eclipse.jface.viewers.TreeViewer.getItemCount(TreeViewer.java:214)
  at org.eclipse.jface.viewers.CheckboxTreeViewer.preservingSelection(CheckboxTreeViewer.java:410)
  at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1455)
  at org.eclipse.jface.viewers.ColumnViewer.refresh(ColumnViewer.java:537)
  at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1414)
  at br.inatel.crswe.views.CDocView$4.resourceChanged(CDocView.java:183)
  at org.eclipse.core.internal.events.NotificationManager$2.run(NotificationManager.java:291)
  at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
  at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:285)
  at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:149)
  at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:313)
  at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1022)
  at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:153)
  at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:238)
  at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)