import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.IProjectDescription;
+import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.IWorkspace;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
                                                remainingWorkUnits--;
                                        }
                                        if (!newProject.isOpen()) {
-                                               newProject.open(new SubProgressMonitor(monitor, 1));
+                                           newProject.open(IResource.BACKGROUND_REFRESH, new SubProgressMonitor(monitor, 1));
                                                remainingWorkUnits--;
                                        }
                                        JavaCore.addPHPNature(newProject, new SubProgressMonitor(