Hi! I have some problems with PyramidBuilder extension. I have png coverage
with size 8000x5280px. When i try to run builder i have some errors when
layer 2 is building. Type of error depends on size of tiles:

----- with command line: -s br_17_05_r.png -t "500,500" -f 2 -n 4 -w -----
INFO: Progress is at 10.00855614973262
attached message is: Preparing to write tile (col,row)==(0,16) to file
c:\teran\work\geotools\2.5-M2_bin\data\pyramid\0\mosaic_8000.tiff
Exception in thread "PyramidBuilder" java.lang.IllegalArgumentException:
Empty source region!
        at
com.sun.media.imageioimpl.plugins.tiff.TIFFImageWriter.write(TIFFImageWriter.java:2534)
        at
com.sun.media.imageioimpl.plugins.tiff.TIFFImageWriter.write(TIFFImageWriter.java:2417)
        at
org.geotools.gce.geotiff.GeoTiffWriter.writeImage(GeoTiffWriter.java:383)
        at
org.geotools.gce.geotiff.GeoTiffWriter.write(GeoTiffWriter.java:214)
        at
org.geotools.utils.coveragetiler.CoverageTiler.run(CoverageTiler.java:445)
        at
org.geotools.utils.imagepyramid.PyramidBuilder.tileInput(PyramidBuilder.java:551)
        at
org.geotools.utils.imagepyramid.PyramidBuilder.run(PyramidBuilder.java:462)
        at java.lang.Thread.run(Unknown Source)

               
----- with command line: -s br_17_05_r.png -t "256,256" -f 2 -n 4 -w -----
INFO: Progress is at 30.027272727272727
attached message is: Reading with grid envelope GeneralEnvelope[(-400.5,
-3959.5), (149.5, -3431.5)]
18.05.2009 11:03:35 org.geotools.utils.imagepyramid.PyramidBuilder
getNotification
INFO: Progress is at 30.0
attached message is: Scaling...
Exception in thread "PyramidBuilder" java.lang.NullPointerException
        at java.awt.RenderingHints.add(Unknown Source)
        at
org.geotools.coverage.processing.BaseScaleOperationJAI.deriveGridCoverage(BaseScaleOperationJAI.java:175)
        at
org.geotools.coverage.processing.OperationJAI.doOperation(OperationJAI.java:316)
        at
org.geotools.utils.imagepyramid.PyramidLayerBuilder.run(PyramidLayerBuilder.java:764)
        at
org.geotools.utils.imagepyramid.PyramidBuilder.buildNewLayer(PyramidBuilder.java:567)
        at
org.geotools.utils.imagepyramid.PyramidBuilder.run(PyramidBuilder.java:492)
        at java.lang.Thread.run(Unknown Source)


After that inside new pyramid folder i found folder "0" with correct data(as
i think) and folder "2" with some tiles. Maybe size of input image must be
predefined? 
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