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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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.
Hi Emmanouela, Here is a list of data formats that is supported by the IDV: https://www.unidata.ucar.edu/software/idv/docs/userguide/data/DataSources.html You might try to untar those data files https://wiki.haskell.org/How_to_unpack_a_tar_file_in_Windows Best, Unidata IDV Support > Full Name: Emmanouela Kalemi > Email Address: address@hidden > Organization: Student at Xarokopeio University > Package Version: 5.4 build date:2017-05-18 16:06 UTC > Operating System: Windows 8.1 > Hardware: Java: home: C:\Program Files (x86)\IDV_5.4\jre version: 1.8.0_51 > j3d:1.6.0-pre12-daily-experimental daily > Description of problem: > > There was an error loading the data: > > Error creating data source:file.grid with: > C:\Users\Emmanouela\Downloads\NCCCSM_SRA2_tas_c30b.tar > Grid data source failed making data set: > C:\Users\Emmanouela\Downloads\NCCCSM_SRA2_tas_c30b.tar > Cant read C:/Users/Emmanouela/Downloads/NCCCSM_SRA2_tas_c30b.tar: not a valid > CDM file. > > ****************** > Stack trace: > java.io.IOException: Cant read > C:/Users/Emmanouela/Downloads/NCCCSM_SRA2_tas_c30b.tar: not a valid CDM file. > at ucar.nc2.NetcdfFile.open(NetcdfFile.java:825) > at ucar.nc2.NetcdfFile.open(NetcdfFile.java:424) > at ucar.nc2.dataset.NetcdfDataset.openOrAcquireFile(NetcdfDataset.java:755) > at ucar.nc2.dataset.NetcdfDataset.openDataset(NetcdfDataset.java:427) > at ucar.nc2.dataset.NetcdfDataset.acquireDataset(NetcdfDataset.java:528) > at ucar.nc2.dt.grid.GridDataset.open(GridDataset.java:117) > at ucar.nc2.dt.grid.GridDataset.open(GridDataset.java:103) > at > ucar.unidata.data.grid.GeoGridDataSource.doMakeDataSet(GeoGridDataSource.java:1189) > at > ucar.unidata.data.grid.GeoGridDataSource.getDataset(GeoGridDataSource.java:1211) > at > ucar.unidata.data.grid.GeoGridDataSource.initAfterCreation(GeoGridDataSource.java:513) > at ucar.unidata.data.DataManager.createDataSource(DataManager.java:1577) > at > ucar.unidata.idv.IntegratedDataViewer.createDataSource(IntegratedDataViewer.java:1978) > at > ucar.unidata.idv.IntegratedDataViewer.makeDataSource(IntegratedDataViewer.java:1895) > at > ucar.unidata.idv.IntegratedDataViewer.makeDataSource(IntegratedDataViewer.java:1829) > at > ucar.unidata.idv.IntegratedDataViewer.makeDataSource(IntegratedDataViewer.java:1802) > at ucar.unidata.idv.chooser.IdvChooser.makeDataSource(IdvChooser.java:943) > at ucar.unidata.idv.chooser.FileChooser.selectFilesInner(FileChooser.java:659) > at ucar.unidata.idv.chooser.FileChooser.selectFiles(FileChooser.java:528) > at ucar.unidata.idv.chooser.FileChooser.doLoadInThread(FileChooser.java:550) > 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:1215) > at ucar.unidata.util.Misc$3.run(Misc.java:1243) > > > Ticket Details =================== Ticket ID: XCQ-556956 Department: Support IDV Priority: Normal Status: Closed =================== NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.