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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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.
Opaluwa, The problem is your data are missing some lat/lon information for display in the IDV. If you would like examples of upper air cosmic data that can be viewed in the IDV please see here: http://motherlode.ucar.edu/repository/entry/show/RAMADDA/RAMADDA+Examples/Sounding+Data/COSMIC+Data?entryid=68a0ac4c-b174-4ec6-b107-a7ca5f0c5727 You can use these examples to give you some idea of a data format that would be acceptable for view in the IDV. Best, Unidata IDV Support > Full Name: Opaluwa Yusuf Drisu > Email Address: address@hidden > Organization: Universiti Teknologi Malaysia > Package Version: 4.1 build date:2013-08-02 18:38 UTC > Operating System: Windows 8 > Hardware: Java: home: C:\Program Files\IDV_4.1\jre version: 1.6.0_43 > j3d:1.5.2 fcs (build4) > Description of problem: > > I downloaded sond and cosmic data for comparison from CDAAC website. I > wanted to display the sond data to enable me extract refractivity and > other variables from it. After selecting the data and the data source type > (as radiosond sounding), the following error message popped up: > > There was an error loading the data: > java.lang.NullPointerException > > I tried to manipulate using another data source type, it still could not > work, what can I do, the file sample file is here attached for possible > suggestion please. > > Thank you > > Yusuf. > > ****************** > Stack trace: > java.lang.NullPointerException > at > ucar.unidata.data.sounding.RaobDataSource.doMakeDataChoices(RaobDataSource.java:273) > at ucar.unidata.data.DataSourceImpl.getDataChoices(DataSourceImpl.java:1852) > at ucar.unidata.data.DataManager.createDataSource(DataManager.java:1599) > 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:1223) > at ucar.unidata.util.Misc$3.run(Misc.java:1251) > > > Ticket Details =================== Ticket ID: NYC-675402 Department: Support IDV Priority: Normal Status: Closed