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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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.
Greetings! The error you are getting is because the dataset you wish to view requires authentication. The IDV can handle some authentication setups, like the one built into the THREDDS data server. However, it looks like the site you are using requires OpenID (which does not seem to be supported in the IDV).It may be the case that you can simply go to one of their datasets and login once (for example, maybe here: https://bmbf-ipcc-ar5.dkrz.de/OpenidRelyingParty/home.htm?redirect=http%3A%2F%2Fbmbf-ipcc-ar5.dkrz.de%2Fthredds%2FdodsC%2Fcmip5%2Foutput1%2FMPI-M%2FMPI-ESM-LR%2F1pctCO2%2Fmon%2Fland%2FLmon%2Fr1i1p1%2Fv20120308%2FburntArea%2FburntArea_Lmon_MPI-ESM-LR_1pctCO2_r1i1p1_185001-198912.nc) and indicate that you would like your OpenID to be remembered on the computer, before accessing the site through the IDV. If that does not work, one way you could get around this would be to log-in to the server and download the data to you machine for direct viewing (as long as the dataset isn't too big). Cheers, Sean > Full Name: Qizhong Wu > Email Address: address@hidden > Organization: Beijing Normal University > Package Version: 3.0u2 build date:2012-02-10 17:21 UTC > Operating System: Windows XP > Hardware: Java: home: C:\Program Files\Java\jre6 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:opendap.grid with: > http://bmbf-ipcc-ar5.dkrz.de/thredds/dodsC/cmip5/output1/MPI-M/MPI-ESM-LR/1pctCO2/mon/land/Lmon/r1i1p1/v20120308/burntArea/burntArea_Lmon_MPI-ESM-LR_1pctCO2_r1i1p1_185001-198912.nc > Grid data source failed making data set: > dods://bmbf-ipcc-ar5.dkrz.de/thredds/dodsC/cmip5/output1/MPI-M/MPI-ESM-LR/1pctCO2/mon/land/Lmon/r1i1p1/v20120308/burntArea/burntArea_Lmon_MPI-ESM-LR_1pctCO2_r1i1p1_185001-198912.nc > HTTP/1.1 401 Unauthorized > > > ****************** > Stack trace: > org.apache.commons.httpclient.auth.InvalidCredentialsException: HTTP/1.1 401 > Unauthorized > at opendap.dap.DConnect2.openConnection(DConnect2.java:276) > at opendap.dap.DConnect2.getDDS(DConnect2.java:517) > at opendap.dap.DConnect2.getDDS(DConnect2.java:491) > at ucar.nc2.dods.DODSNetcdfFile.<init>(DODSNetcdfFile.java:212) > at ucar.nc2.dataset.NetcdfDataset.acquireDODS(NetcdfDataset.java:809) > at ucar.nc2.dataset.NetcdfDataset.openOrAcquireFile(NetcdfDataset.java:654) > at ucar.nc2.dataset.NetcdfDataset.openDataset(NetcdfDataset.java:424) > at ucar.nc2.dataset.NetcdfDataset.acquireDataset(NetcdfDataset.java:520) > at ucar.nc2.dt.grid.GridDataset.open(GridDataset.java:101) > at ucar.nc2.dt.grid.GridDataset.open(GridDataset.java:87) > at > ucar.unidata.data.grid.GeoGridDataSource.doMakeDataSet(GeoGridDataSource.java:1094) > at > ucar.unidata.data.grid.GeoGridDataSource.getDataset(GeoGridDataSource.java:1116) > at > ucar.unidata.data.grid.GeoGridDataSource.initAfterCreation(GeoGridDataSource.java:478) > at ucar.unidata.data.DataManager.createDataSource(DataManager.java:1577) > at ucar.unidata.data.DataManager.createDataSource(DataManager.java:1344) > at ucar.unidata.data.DataManager.createDataSource(DataManager.java:1327) > at > ucar.unidata.idv.IntegratedDataViewer.loadDataFiles(IntegratedDataViewer.java:556) > at > ucar.unidata.idv.IntegratedDataViewer.initInner(IntegratedDataViewer.java:622) > at ucar.unidata.idv.IntegratedDataViewer$3.run(IntegratedDataViewer.java:532) > at ucar.unidata.util.Misc$3.run(Misc.java:1090) > > > Ticket Details =================== Ticket ID: FMK-632620 Department: Support IDV Priority: Normal Status: Open