Nullpointer exception when deleting a layer

Hi,

I loaded two AIA layers for the time interval 2010/11/01-08. AIA 304 with 15 min cadence (master layer), AIA 171 with 1h cadence. When I deleted the AIA 171 layer, I received thhe pop-up below. JHV continued working.

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Uncaught Exception detected.

JHelioviewer Version: null

JHelioviewer Revision: null

Date: Wed Nov 10 09:15:28 GMT 2010

Thread: Thread[J2KRender,6,J2KRenderGroup]

Message: null

Stacktrace:
java.lang.NullPointerException
at org.helioviewer.jhv.layers.LayersModel.getCurrentFrameTimestamp(LayersModel.java:246)
at org.helioviewer.jhv.layers.LayersModel.getCurrentFrameTimestamp(LayersModel.java:234)
at org.helioviewer.jhv.layers.LayersModel.handleTimestampChanges(LayersModel.java:688)
at org.helioviewer.jhv.layers.LayersModel.viewChanged(LayersModel.java:720)
at org.helioviewer.jhv.gui.ViewListenerDistributor.notifyViewListener(ViewListenerDistributor.java:126)
at org.helioviewer.jhv.gui.ViewListenerDistributor.viewChanged(ViewListenerDistributor.java:108)
at org.helioviewer.viewmodel.view.AbstractView.notifyViewListeners(AbstractView.java:70)
at org.helioviewer.viewmodel.view.opengl.GLComponentView.viewChanged(GLComponentView.java:203)
at org.helioviewer.viewmodel.view.AbstractView.notifyViewListeners(AbstractView.java:70)
at org.helioviewer.viewmodel.view.opengl.AbstractGLView.viewChanged(AbstractGLView.java:33)
at org.helioviewer.viewmodel.view.opengl.GLOverlayView.viewChanged(GLOverlayView.java:75)
at org.helioviewer.viewmodel.view.AbstractView.notifyViewListeners(AbstractView.java:70)
at org.helioviewer.viewmodel.view.StandardSolarRotationTrackingView.viewChanged(StandardSolarRotationTrackingView.java:129)
at org.helioviewer.viewmodel.view.AbstractView.notifyViewListeners(AbstractView.java:70)
at org.helioviewer.viewmodel.view.AbstractLayeredView.redrawBuffer(AbstractLayeredView.java:537)
at org.helioviewer.viewmodel.view.AbstractLayeredView.viewChanged(AbstractLayeredView.java:463)
at org.helioviewer.viewmodel.view.AbstractView.notifyViewListeners(AbstractView.java:70)
at org.helioviewer.viewmodel.view.opengl.AbstractGLView.viewChanged(AbstractGLView.java:33)
at org.helioviewer.viewmodel.view.AbstractView.notifyViewListeners(AbstractView.java:70)
at org.helioviewer.viewmodel.view.opengl.GLFilterView.viewChanged(GLFilterView.java:128)
at org.helioviewer.viewmodel.view.AbstractView.notifyViewListeners(AbstractView.java:70)
at org.helioviewer.viewmodel.view.opengl.GLFilterView.viewChanged(GLFilterView.java:128)
at org.helioviewer.viewmodel.view.AbstractView.notifyViewListeners(AbstractView.java:70)
at org.helioviewer.viewmodel.view.opengl.GLFilterView.viewChanged(GLFilterView.java:128)
at org.helioviewer.viewmodel.view.AbstractView.notifyViewListeners(AbstractView.java:70)
at org.helioviewer.viewmodel.view.opengl.GLFilterView.viewChanged(GLFilterView.java:128)
at org.helioviewer.viewmodel.view.AbstractView.notifyViewListeners(AbstractView.java:70)
at org.helioviewer.viewmodel.view.jp2view.JHVJP2View.setSubimageData(JHVJP2View.java:663)
at org.helioviewer.viewmodel.view.jp2view.JHVJPXView.setSubimageData(JHVJPXView.java:373)
at org.helioviewer.viewmodel.view.jp2view.J2KRender.run(J2KRender.java:354)
at java.lang.Thread.run(Thread.java:680)