image editing PathNotFound

20.04.2011 14:12:51 ERROR [org.hippoecm.frontend.plugins.gallery.editor.ImageRegeneratePlugin.regenerateThumbnail():168] Unable to create thumbnail image
javax.jcr.PathNotFoundException: hippogallery:filename
at org.apache.jackrabbit.core.NodeImpl$11.perform(NodeImpl.java:2218)
at org.apache.jackrabbit.core.NodeImpl$11.perform(NodeImpl.java:2205)
at org.apache.jackrabbit.core.session.SessionState.perform(SessionState.java:200)
at org.apache.jackrabbit.core.ItemImpl.perform(ItemImpl.java:91)
at org.apache.jackrabbit.core.NodeImpl.getProperty(NodeImpl.java:2205)
at org.hippoecm.repository.decorating.NodeDecorator.getProperty(NodeDecorator.java:251)
at org.hippoecm.repository.decorating.checked.NodeDecorator.getProperty(NodeDecorator.java:305)
at org.hippoecm.frontend.plugins.gallery.editor.ImageRegeneratePlugin.regenerateThumbnail(ImageRegeneratePlugin.java:154)
at org.hippoecm.frontend.plugins.gallery.editor.ImageRegeneratePlugin.access$300(ImageRegeneratePlugin.java:55)
at org.hippoecm.frontend.plugins.gallery.editor.ImageRegeneratePlugin$3.onEvent(ImageRegeneratePlugin.java:118)
at org.apache.wicket.ajax.AjaxEventBehavior.respond(AjaxEventBehavior.java:177)
at org.apache.wicket.ajax.AbstractDefaultAjaxBehavior.onRequest(AbstractDefaultAjaxBehavior.java:302)
at org.apache.wicket.request.target.component.listener.BehaviorRequestTarget.processEvents(BehaviorRequestTarget.java:157)
at org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:92)
at org.hippoecm.frontend.PluginRequestCycleProcessor.processEvents(PluginRequestCycleProcessor.java:95)