This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
Dear Antonella, Why not simply load the original netCDF file into the IDV? Be sure to select the correct data source type in the Data Choosers of the IDV Dashboard. Please keep us up to date on your progress. Best Wishes, Unidata IDV Support > Full Name: Antonella > Email Address: address@hidden > Organization: National Council of Research (Rome,Italy) > Package Version: 4.0u1 build date:2013-03-29 18:10 UTC > Operating System: Windows 7 > Hardware: Java: home: C:\Program Files\IDV_4.0u1\jre version: 1.6.0_43 > j3d:1.5.2 fcs (build4) > Description of problem: > > I would open the file in attach and I read following message: > > There was an error loading the data: > java.lang.NullPointerException > > Please, note that I convert original netcdf file in to grb file by mean > of linux application, while my actual IDV is a windows application > > thanks very much > > ****************** > Stack trace: > java.lang.NullPointerException > at ucar.nc2.Variable.setDataType(Variable.java:1206) > at ucar.nc2.Variable.<init>(Variable.java:1164) > at ucar.nc2.grib.grib1.Grib1Iosp.addVerticalCoordinate(Grib1Iosp.java:405) > at ucar.nc2.grib.grib1.Grib1Iosp.addGroup(Grib1Iosp.java:272) > at ucar.nc2.grib.grib1.Grib1Iosp.open(Grib1Iosp.java:159) > at ucar.nc2.NetcdfFile.<init>(NetcdfFile.java:1494) > at ucar.nc2.NetcdfFile.open(NetcdfFile.java:786) > at ucar.nc2.NetcdfFile.open(NetcdfFile.java:395) > at ucar.nc2.dataset.NetcdfDataset.openOrAcquireFile(NetcdfDataset.java:687) > at ucar.nc2.dataset.NetcdfDataset.openDataset(NetcdfDataset.java:418) > at ucar.nc2.dataset.NetcdfDataset.acquireDataset(NetcdfDataset.java:513) > at ucar.nc2.dt.grid.GridDataset.open(GridDataset.java:104) > at ucar.nc2.dt.grid.GridDataset.open(GridDataset.java:90) > at > ucar.unidata.data.grid.GeoGridDataSource.doMakeDataSet(GeoGridDataSource.java:1113) > at > ucar.unidata.data.grid.GeoGridDataSource.getDataset(GeoGridDataSource.java:1135) > at > ucar.unidata.data.grid.GeoGridDataSource.initAfterCreation(GeoGridDataSource.java:499) > at ucar.unidata.data.DataManager.createDataSource(DataManager.java:1597) > at > ucar.unidata.idv.IntegratedDataViewer.createDataSource(IntegratedDataViewer.java:1980) > at > ucar.unidata.idv.IntegratedDataViewer.makeDataSource(IntegratedDataViewer.java:1897) > at > ucar.unidata.idv.IntegratedDataViewer.makeDataSource(IntegratedDataViewer.java:1831) > at > ucar.unidata.idv.IntegratedDataViewer.makeDataSource(IntegratedDataViewer.java:1804) > at ucar.unidata.idv.chooser.IdvChooser.makeDataSource(IdvChooser.java:943) > at ucar.unidata.idv.chooser.FileChooser.selectFilesInner(FileChooser.java:656) > at ucar.unidata.idv.chooser.FileChooser.selectFiles(FileChooser.java:525) > at ucar.unidata.idv.chooser.FileChooser.doLoadInThread(FileChooser.java:547) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) > at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) > at java.lang.reflect.Method.invoke(Unknown Source) > at ucar.unidata.util.Misc$2.run(Misc.java:1221) > at ucar.unidata.util.Misc$3.run(Misc.java:1249) > > > Ticket Details =================== Ticket ID: UYR-157949 Department: Support IDV Priority: Normal Status: Closed