Gear Watch Designer error on loading project

Hi to all.
The last Friday when I opened the GWD I got an error on loading an old project: on Internet I read that must delete the .metadata folder in the user folder the the GWD creates.
OK. I resolved.
This morning I re-opened my last project and again I got the error: the error log is

!SESSION 2016-04-27 08:02:02.638 -----------------------------------------------
eclipse.buildId=unknown
java.version=1.8.0_66
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=it_IT
Command-line arguments: -os win32 -ws win32 -arch x86 -data @nodefault

!ENTRY org.eclipse.osgi 4 0 2016-04-27 08:02:33.247
!MESSAGE Application error
!STACK 1
java.lang.NullPointerException
at wfb_view.gef.ComponentData.setCondition(ComponentD ata.java:483)
at wfb_view.gef.ComponentData.setCondition(ComponentD ata.java:395)
at wfb_view.gef.ComponentData.setCondition(ComponentD ata.java:399)
at wfb_view.composites.conditionalline.frames.Composi teFramesFooter.setCurrentValue(CompositeFramesFoot er.java:475)
at wfb_view.composites.conditionalline.frames.Composi teFramesFooter.changeFooterMode(CompositeFramesFoo ter.java:332)
at wfb_view.composites.conditionalline.frames.Composi teFramesFooter.propertyChange(CompositeFramesFoote r.java:369)
at java.beans.PropertyChangeSupport.fire(Unknown Source)
at java.beans.PropertyChangeSupport.firePropertyChang e(Unknown Source)
at java.beans.PropertyChangeSupport.firePropertyChang e(Unknown Source)
at wfb_view.common.EventManager.firePropertyChange(Ev entManager.java:62)
at wfb_view.composites.conditionalline.CompositeCondi tionalLine.changeMode(CompositeConditionalLine.jav a:53)
at wfb_view.composites.conditionalline.tabs.Composite TabItem.activate(CompositeTabItem.java:152)
at wfb_view.composites.conditionalline.tabs.Composite ConditionalLineTabs.addNewTab(CompositeConditional LineTabs.java:101)
at wfb_view.action.file.ImportProjectHandler.execute( ImportProjectHandler.java:63)
at wfb_view.action.file.OpenProjectHandler.execute(Op enProjectHandler.java:50)
at wfb_view.ui.titlebar.CompositeTitlebarMenuItem.mou seUp(CompositeTitlebarMenuItem.java:84)
at wfb_view.ui.titlebar.CompositeTitlebarMenuItem2.mo useUp(CompositeTitlebarMenuItem2.java:44)
at org.eclipse.swt.widgets.TypedListener.handleEvent( TypedListener.java:220)
at org.eclipse.swt.widgets.EventTable.sendEvent(Event Table.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display. java:4353)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.ja va:1061)
at org.eclipse.swt.widgets.Display.runDeferredEvents( Display.java:4172)
at org.eclipse.swt.widgets.Display.readAndDispatch(Di splay.java:3761)
at wfb_view.Application.start(Application.java:174)
at org.eclipse.equinox.internal.app.EclipseAppHandle. run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseA ppLauncher.runApplication(EclipseAppLauncher.java: 134)
at org.eclipse.core.runtime.internal.adaptor.EclipseA ppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.ru n(EclipseStarter.java:380)
at org.eclipse.core.runtime.adaptor.EclipseStarter.ru n(EclipseStarter.java:235)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknow n Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Un known Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework( Main.java:648)
at org.eclipse.equinox.launcher.Main.basicRun(Main.ja va:603)
at org.eclipse.equinox.launcher.Main.run(Main.java:14 65)
!SESSION 2016-04-27 08:08:16.588 -----------------------------------------------
eclipse.buildId=unknown
java.version=1.8.0_66
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=it_IT
Command-line arguments: -os win32 -ws win32 -arch x86 -data @nodefault

!ENTRY org.eclipse.osgi 4 0 2016-04-27 08:08:46.940
!MESSAGE Application error
!STACK 1
java.lang.NullPointerException
at wfb_view.gef.ComponentData.setCondition(ComponentD ata.java:483)
at wfb_view.gef.ComponentData.setCondition(ComponentD ata.java:395)
at wfb_view.gef.ComponentData.setCondition(ComponentD ata.java:399)
at wfb_view.composites.conditionalline.frames.Composi teFramesFooter.setCurrentValue(CompositeFramesFoot er.java:475)
at wfb_view.composites.conditionalline.frames.Composi teFramesFooter.changeFooterMode(CompositeFramesFoo ter.java:332)
at wfb_view.composites.conditionalline.frames.Composi teFramesFooter.propertyChange(CompositeFramesFoote r.java:369)
at java.beans.PropertyChangeSupport.fire(Unknown Source)
at java.beans.PropertyChangeSupport.firePropertyChang e(Unknown Source)
at java.beans.PropertyChangeSupport.firePropertyChang e(Unknown Source)
at wfb_view.common.EventManager.firePropertyChange(Ev entManager.java:62)
at wfb_view.composites.conditionalline.CompositeCondi tionalLine.changeMode(CompositeConditionalLine.jav a:53)
at wfb_view.composites.conditionalline.tabs.Composite TabItem.activate(CompositeTabItem.java:152)
at wfb_view.composites.conditionalline.tabs.Composite ConditionalLineTabs.addNewTab(CompositeConditional LineTabs.java:101)
at wfb_view.action.file.ImportProjectHandler.execute( ImportProjectHandler.java:63)
at wfb_view.action.file.OpenProjectHandler.execute(Op enProjectHandler.java:50)
at wfb_view.ui.titlebar.CompositeTitlebarMenuItem.mou seUp(CompositeTitlebarMenuItem.java:84)
at wfb_view.ui.titlebar.CompositeTitlebarMenuItem2.mo useUp(CompositeTitlebarMenuItem2.java:44)
at org.eclipse.swt.widgets.TypedListener.handleEvent( TypedListener.java:220)
at org.eclipse.swt.widgets.EventTable.sendEvent(Event Table.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display. java:4353)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.ja va:1061)
at org.eclipse.swt.widgets.Display.runDeferredEvents( Display.java:4172)
at org.eclipse.swt.widgets.Display.readAndDispatch(Di splay.java:3761)
at wfb_view.Application.start(Application.java:174)
at org.eclipse.equinox.internal.app.EclipseAppHandle. run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseA ppLauncher.runApplication(EclipseAppLauncher.java: 134)
at org.eclipse.core.runtime.internal.adaptor.EclipseA ppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.ru n(EclipseStarter.java:380)
at org.eclipse.core.runtime.adaptor.EclipseStarter.ru n(EclipseStarter.java:235)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknow n Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Un known Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework( Main.java:648)
at org.eclipse.equinox.launcher.Main.basicRun(Main.ja va:603)
at org.eclipse.equinox.launcher.Main.run(Main.java:14 65)

Is there a way to resolve definitely this kind of error?

Thanks a lot

GS
ITALY

from xda-developers http://ift.tt/1YT7mBT
via IFTTT