[IDV #CLW-872110]: Error loading local model data (netcdf)

["Unidata IDV Support" <support-idv@xxxxxxxxxxxxxxxx>]

Hi Steve-

> Full Name: Steve Keighton
> Email Address: stephen.keighton@xxxxxxxx
> Organization: NOAA/NWS Blacksburg, VA
> Package Version: 2.7u2 build date:2009-08-26 16:33 UTC
> Operating System: Windows XP
> Hardware: Java: home: C:\Program Files\IDV_2.7u2\jre version: 1.6.0_13 
> j3d:1.5.2 fcs (build4)
> Description of problem: There was an error loading the data:
> Error creating data source:aggregated.netcdf.grid with: 
> [R:\WRF\Camille_12Z\wrfout_d03_1969-08-19_12, 
> R:\WRF\Camille_12Z\wrfout_d03_1969-08-19_13, 
> R:\WRF\Camille_12Z\wrfout_d03_1969-08-19_14, 
> R:\WRF\Camille_12Z\wrfout_d03_1969-08-19_15, 
> R:\WRF\Camille_12Z\wrfout_d03_1969-08-19_16, 
> R:\WRF\Camille_12Z\wrfout_d03_1969-08-19_17, 
> R:\WRF\Camille_12Z\wrfout_d03_1969-08-19_18, 
> R:\WRF\Camille_12Z\wrfout_d03_1969-08-19_19, 
> R:\WRF\Camille_12Z\wrfout_d03_1969-08-19_20, 
> R:\WRF\Camille_12Z\wrfout_d03_1969-08-19_21, 
> R:\WRF\Camille_12Z\wrfout_d03_1969-08-19_22, 
> R:\WRF\Camille_12Z\wrfout_d03_1969-08-19_23, 
> R:\WRF\Camille_12Z\wrfout_d03_1969-08-20_00, 
> R:\WRF\Camille_12Z\wrfout_d03_1969-08-20_01, 
> R:\WRF\Camille_12Z\wrfout_d03_1969-08-20_02, 
> R:\WRF\Camille_12Z\wrfout_d03_1969-08-20_03, 
> R:\WRF\Camille_12Z\wrfout_d03_1969-08-20_04, 
> R:\WRF\Camille_12Z\wrfout_d03_1969-08-20_05, 
> R:\WRF\Camille_12Z\wrfout_d03_1969-08-20_06, 
> R:\WRF\Camille_12Z\wrfout_d03_1969-08-20_07, R:\WRF\Camille_12Z\wrfout_d03_1
 969-08-20_08, R:\WRF\Camille_12Z\wrfout_d03_1969-08-20_09, 
R:\WRF\Camille_12Z\wrfout_d03_1969-08-20_10, 
R:\WRF\Camille_12Z\wrfout_d03_1969-08-20_11, 
R:\WRF\Camille_12Z\wrfout_d03_1969-08-20_12]
> Grid data source failed making data set: 
> \\Wrnksevr1\users\stephen.keighton\.unidata\idv\DefaultIdv\tmp\multigrid0.ncml
> AggregationExisting: no coordinate variable for agg dimension= time

WRF netCDF grids are problematic to aggregate since the time variable is 
different than what the aggregator expects.  In the next nightly build, there 
will be a new Data Source Type called "Aggregate WRF netCDF Grids by Time".  If 
you use that, it will do what you want.  You can download the nightly build 
from the IDV downloads page:

http://www.unidata.ucar.edu/downloads/idv

However, using the raw WRF netCDF grids is a resource intensive way to look at 
the data. The grids are staggered and do not contain the standard 
meteorological parameters and levels that most people use.  As with most other 
packages, we recommend running a postprocessor on your WRF output to destagger 
the grids and calculate the standard met variables/levels.  See the FAQ item at:

http://www.unidata.ucar.edu/software/IDV/docs/userguide/Faq.html#wrf

Don Murray





> ******************
> Stack trace:
> java.lang.IllegalArgumentException: AggregationExisting: no coordinate 
> variable for agg dimension= time
> at 
> ucar.nc2.ncml.AggregationExisting.buildNetcdfDataset(AggregationExisting.java:83)
> at ucar.nc2.ncml.Aggregation.finish(Aggregation.java:295)
> at ucar.nc2.ncml.NcMLReader.readNetcdf(NcMLReader.java:466)
> at ucar.nc2.ncml.NcMLReader.readNcML(NcMLReader.java:413)
> at ucar.nc2.ncml.NcMLReader.readNcML(NcMLReader.java:234)
> at ucar.nc2.ncml.NcMLReader.readNcML(NcMLReader.java:184)
> at ucar.nc2.dataset.NetcdfDataset.acquireNcml(NetcdfDataset.java:818)
> at ucar.nc2.dataset.NetcdfDataset.openOrAcquireFile(NetcdfDataset.java:694)
> at ucar.nc2.dataset.NetcdfDataset.openDataset(NetcdfDataset.java:434)
> at ucar.nc2.dataset.NetcdfDataset.acquireDataset(NetcdfDataset.java:544)
> at ucar.nc2.dt.grid.GridDataset.open(GridDataset.java:88)
> at 
> ucar.unidata.data.grid.GeoGridDataSource.doMakeDataSet(GeoGridDataSource.java:1052)
> at 
> ucar.unidata.data.grid.GeoGridDataSource.getDataset(GeoGridDataSource.java:1074)
> at 
> ucar.unidata.data.grid.GeoGridDataSource.initAfterCreation(GeoGridDataSource.java:443)
> at ucar.unidata.data.DataManager.createDataSource(DataManager.java:1525)
> at 
> ucar.unidata.idv.IntegratedDataViewer.createDataSource(IntegratedDataViewer.java:1968)
> at 
> ucar.unidata.idv.IntegratedDataViewer.makeDataSource(IntegratedDataViewer.java:1885)
> at 
> ucar.unidata.idv.IntegratedDataViewer.makeDataSource(IntegratedDataViewer.java:1819)
> at 
> ucar.unidata.idv.IntegratedDataViewer.makeDataSource(IntegratedDataViewer.java:1792)
> at ucar.unidata.idv.chooser.IdvChooser.makeDataSource(IdvChooser.java:907)
> at ucar.unidata.idv.chooser.FileChooser.selectFilesInner(FileChooser.java:648)
> at ucar.unidata.idv.chooser.FileChooser.selectFiles(FileChooser.java:517)
> at ucar.unidata.idv.chooser.FileChooser.doLoadInThread(FileChooser.java:539)
> 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:1033)
> at ucar.unidata.util.Misc$3.run(Misc.java:1061)
> 
> 
> 


Ticket Details
===================
Ticket ID: CLW-872110
Department: Support IDV
Priority: Normal
Status: Open