I found an issue with no-data values. I opened a GeoTiff (GDAL reader) and when opening the image the following dialog is shown:
When using the plain SNAP reader this happens already when reading the the file:
java.lang.NumberFormatException: For input string: "-inf"
at java.base/jdk.internal.math.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2054)
at java.base/jdk.internal.math.FloatingDecimal.parseDouble(FloatingDecimal.java:110)
at java.base/java.lang.Double.parseDouble(Double.java:792)
at it.geosolutions.imageioimpl.plugins.tiff.TIFFImageReader.initializeFromMetadata(TIFFImageReader.java:1324)
at it.geosolutions.imageioimpl.plugins.tiff.TIFFImageReader.seekToImage(TIFFImageReader.java:865)
at it.geosolutions.imageioimpl.plugins.tiff.TIFFImageReader.getImageMetadata(TIFFImageReader.java:1476)
at org.esa.snap.dataio.geotiff.GeoTiffImageReader.getImageMetadata(GeoTiffImageReader.java:131)
at org.esa.snap.dataio.geotiff.GeoTiffImageReader.readNoDataValue(GeoTiffImageReader.java:310)
at org.esa.snap.dataio.geotiff.GeoTiffImageReader.<init>(GeoTiffImageReader.java:91)
at org.esa.snap.dataio.geotiff.GeoTiffImageReader.buildGeoTiffImageReader(GeoTiffImageReader.java:359)
at org.esa.snap.dataio.geotiff.GeoTiffImageReader.buildGeoTiffImageReader(GeoTiffImageReader.java:330)
at org.esa.snap.dataio.geotiff.GeoTiffProductReader.readProductNodesImpl(GeoTiffProductReader.java:96)
at org.esa.snap.core.dataio.AbstractProductReader.readProductNodes(AbstractProductReader.java:181)
at org.esa.snap.core.dataio.ProductIO.readProduct(ProductIO.java:180)
at org.esa.snap.rcp.actions.file.ReadProductOperation.run(ReadProductOperation.java:61)
at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1420)
at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
The file is read and handled correctly in QGIS for example.