[Pydev-users] [Users] RE: Problem with 'non-PyDev Projects' filter

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The following forum message was posted by piotr_dobrogost at http://sourceforge.net/projects/pydev/forums/forum/293649/topic/4734668:

In .metadata/.log file inside my workspace there are many entries like the one
below.
Could someone explain what's the reason for this?
Can this be connected with the problem I described in my question titled
[url=http://stackoverflow.com/questions/7621027/]What's the reason of disappearing
of information on project's natures?[/url] at stackoverflow.com?

!ENTRY org.eclipse.core.expressions 4 201 2011-10-01 18:12:30.692
!MESSAGE No property tester contributes a property com.aptana.ide.core.ui.nature
to type class org.python.pydev.navigator.elements.PythonProjectSourceFolder
!STACK 1
org.eclipse.core.runtime.CoreException: No property tester contributes a property
com.aptana.ide.core.ui.nature to type class
org.python.pydev.navigator.elements.PythonProjectSourceFolder
	at org.eclipse.core.internal.expressions.TypeExtensionManager.getProperty(TypeE
xtensionManager.java:123)
	at org.eclipse.core.internal.expressions.TestExpression.evaluate(TestExpression
.java:96)
	at org.eclipse.core.internal.expressions.CompositeExpression.evaluateOr(Composi
teExpression.java:68)
	at org.eclipse.core.internal.expressions.OrExpression.evaluate(OrExpression.jav
a:21)
	at org.eclipse.core.internal.expressions.CompositeExpression.evaluateAnd(Compos
iteExpression.java:53)
	at org.eclipse.core.internal.expressions.AndExpression.evaluate(AndExpression.j
ava:29)
	at org.eclipse.ui.internal.dialogs.RegistryPageContributor.failsEnablement(Regi
stryPageContributor.java:311)
	at org.eclipse.ui.internal.dialogs.RegistryPageContributor.isApplicableTo(Regis
tryPageContributor.java:251)
	at org.eclipse.ui.internal.dialogs.PropertyPageContributorManager.getApplicable
Contributors(PropertyPageContributorManager.java:218)
	at org.eclipse.ui.internal.dialogs.PropertyPageContributorManager.getApplicable
Contributors(PropertyPageContributorManager.java:237)
	at org.eclipse.ui.dialogs.PropertyDialogAction.hasPropertyPagesFor(PropertyDial
ogAction.java:105)
	at org.eclipse.ui.dialogs.PropertyDialogAction.isApplicableForSelection(Propert
yDialogAction.java:147)
	at org.eclipse.ui.dialogs.PropertyDialogAction.isApplicableForSelection(Propert
yDialogAction.java:127)
	at org.eclipse.ui.internal.navigator.resources.actions.PropertiesActionProvider
.fillContextMenu(PropertiesActionProvider.java:62)
	at org.eclipse.ui.navigator.NavigatorActionService$2.run(NavigatorActionService
.java:221)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.ui.navigator.NavigatorActionService.addCommonActionProviderMenu(
NavigatorActionService.java:216)
	at org.eclipse.ui.navigator.NavigatorActionService.fillContextMenu(NavigatorAct
ionService.java:173)
	at org.eclipse.ui.navigator.CommonNavigatorManager.fillContextMenu(CommonNaviga
torManager.java:260)
	at org.eclipse.ui.navigator.CommonNavigatorManager$4.menuAboutToShow(CommonNavi
gatorManager.java:275)
	at org.eclipse.jface.action.MenuManager.fireAboutToShow(MenuManager.java:342)
	at org.eclipse.jface.action.MenuManager.handleAboutToShow(MenuManager.java:473)
	at org.eclipse.jface.action.MenuManager.access$1(MenuManager.java:469)
	at org.eclipse.jface.action.MenuManager$2.menuShown(MenuManager.java:495)
	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:247)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1058)
	at org.eclipse.swt.widgets.Control.WM_INITMENUPOPUP(Control.java:4881)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:4557)
	at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341)
	at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1610)
	at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2061)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:4972)
	at org.eclipse.swt.internal.win32.OS.TrackPopupMenu(Native Method)
	at org.eclipse.swt.widgets.Menu._setVisible(Menu.java:256)
	at org.eclipse.swt.widgets.Display.runPopups(Display.java:4206)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3748)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494)
	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.
java:123)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:
196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(
EclipseAppLauncher.jav