exc

Exception in thread "TrackMate preview detection thread" java.lang.NullPointerException
	at net.imagej.ops.convolve.ConvolveFFTRAI.frequencyOperation(ConvolveFFTRAI.java:65)
	at net.imagej.ops.fft.filter.LinearFFTFilterRAI.run(LinearFFTFilterRAI.java:66)
	at org.scijava.command.CommandModule.run(CommandModule.java:201)
	at net.imagej.ops.DefaultOpService.run(DefaultOpService.java:363)
	at net.imagej.ops.DefaultOpService.run(DefaultOpService.java:77)
	at fiji.plugin.trackmate.detection.findmaxima.FindMaximaSpotDetector.createSecondDerivativeImage(FindMaximaSpotDetector.java:131)
	at fiji.plugin.trackmate.detection.findmaxima.FindMaximaSpotDetector.process(FindMaximaSpotDetector.java:152)
	at fiji.plugin.trackmate.TrackMate$1.run(TrackMate.java:433)
	at net.imglib2.multithreading.SimpleMultiThreading.startAndJoin(SimpleMultiThreading.java:125)
	at fiji.plugin.trackmate.TrackMate.execDetection(TrackMate.java:505)
	at fiji.plugin.trackmate.gui.panels.detector.LogDetectorConfigurationPanel$1.run(LogDetectorConfigurationPanel.java:230)