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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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.
> Full Name: Angela Reside > Email Address: address@hidden > Organization: Applied Weather Technology > Package Version: 5.0u2 build date:2014-11-10 08:05 UTC > Operating System: Windows 7 > Hardware: Java: home: C:\Program Files\IDV_5.0u2\jre version: 1.7.0_51 > j3d:1.6.0-pre9-daily-experimental daily > Description of problem: > > Hello Unidata Support, > > I am attempting to load some GRD files into IDV using the data source type > "aggregated grid by time". However I keep receiving the error below. > I'm assuming it's due to a missing time variable? Is it possible to > fix this in Jython?? > > Thanks, > Angie Angie, You can fix this in the ncml, not Jython. Yuan > > There was an error loading the data: > Error creating data source:aggregated.netcdf.grid with: > [\\nfs-hit\awt\dat4ops\gmt_grd\awt\ww3\westnatl\2013\01\mwvdr_2013010100.grd, > \\nfs-hit\awt\dat4ops\gmt_grd\awt\ww3\westnatl\2013\01\mwvdr_2013010103.grd, > \\nfs-hit\awt\dat4ops\gmt_grd\awt\ww3\westnatl\2013\01\mwvdr_2013010106.grd, > \\nfs-hit\awt\dat4ops\gmt_grd\awt\ww3\westnatl\2013\01\mwvdr_2013010109.grd] > Grid data source failed making data set: > C:\Users\areside\.unidata\idv\DefaultIdv\tmp\multigrid_95ab87ea-9994-4b4b-8f7f-81d21bd35c500.ncml > AggregationExisting: no coordinate variable for agg dimension= time > > ****************** > Stack trace: > java.lang.IllegalArgumentException: AggregationExisting: no coordinate > variable for agg dimension= time > at > ucar.nc2.ncml.AggregationExisting.buildNetcdfDataset(AggregationExisting.java:86) > at ucar.nc2.ncml.Aggregation.finish(Aggregation.java:417) > at ucar.nc2.ncml.NcMLReader.readNetcdf(NcMLReader.java:493) > at ucar.nc2.ncml.NcMLReader.readNcML(NcMLReader.java:438) > at ucar.nc2.ncml.NcMLReader.readNcML(NcMLReader.java:253) > at ucar.nc2.ncml.NcMLReader.readNcML(NcMLReader.java:203) > at ucar.nc2.dataset.NetcdfDataset.acquireNcml(NetcdfDataset.java:1081) > at ucar.nc2.dataset.NetcdfDataset.openOrAcquireFile(NetcdfDataset.java:688) > at ucar.nc2.dataset.NetcdfDataset.openDataset(NetcdfDataset.java:421) > at ucar.nc2.dataset.NetcdfDataset.acquireDataset(NetcdfDataset.java:516) > 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:1160) > at > ucar.unidata.data.grid.GeoGridDataSource.getDataset(GeoGridDataSource.java:1182) > at > ucar.unidata.data.grid.GeoGridDataSource.initAfterCreation(GeoGridDataSource.java:502) > at ucar.unidata.data.DataManager.createDataSource(DataManager.java:1602) > 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:1215) > at ucar.unidata.util.Misc$3.run(Misc.java:1243) > > > Ticket Details =================== Ticket ID: TYB-183387 Department: Support IDV Priority: Normal Status: Closed