[IDV #YHN-171651]: Loading Point Data File: java.lang.NullPointerException

Hi Patrick,

I see from the other support question that you were using Excel to manipulate 
the CSV
file. It looks like Excel changed the format of your date/time stamps in the 
data, thus
making you header incorrect. Make sure you tell Excel to use the proper date 
format,

yyyy-MM-dd HH:mm:ss

before you export to CSV.

Cheers,

Sean

> Hi Patrick,
> 
> The header in the file you sent me was indeed messed up. When you reserved 
> the file,
> how exactly did you do it?
> 
> Sean
> 
> > Thanks Sean.
> >
> > One more issue.  I have been in contact with a Yuan at your IDV support.  
> > He mentioned to me that if I wanted to make edits to a point data file, I 
> > could not use Jython functions within IDV, but rather export the IDV 
> > Mesowest data to a .CSV file, edit it, then re-read it into IDV.
> >
> > When testing the export of the .CSV file and re-reading in IDV, it works 
> > OK.   However, when exporting the .CSV file, and re-saving it as .CSV with 
> > no edits applied to either the data or headers, IDV won't read it.
> >
> > There was an error loading the data:
> > java.lang.NullPointerException
> >
> >
> > The exported and saved .CSV file is attached.  Since you noted that my last 
> > header was missing a few things, it seems like there is an issue with this 
> > header.  However, this is exactly how IDV exports it to a .CSV file?
> >
> > Any insight would be much appreciated.
> >
> > Patrick
> > ________________________________________
> > From: Unidata IDV Support [address@hidden]
> > Sent: Wednesday, July 25, 2012 7:52 AM
> > To: Patrick C. Campbell
> > Cc: address@hidden
> > Subject: [IDV #YHN-171651]: Loading Point Data File: 
> > java.lang.NullPointerException
> >
> > Greetings Patrick,
> >
> > It looks like your header was missing a few things. Here is a header that 
> > works for your data file:
> >
> > (index)->(Time,Station(Text),Latitude,Longitude,Altitude,MNETID(Text),Mesonet(Text),T,RH,WSPD,WDIR,PSL,ALTI,TD)
> > Time[fmt="yyyy-MM-dd 
> > HH:mm"],Station(Text)[],Latitude[unit="degrees"],Longitude[unit="degrees"],Altitude[unit="foot"],MNETID(Text)[],Mesonet(Text)[],T[unit="Celsius"
> >  missing="-9999"],RH[unit="percent" missing="-9999"],WSPD[unit="kt" 
> > missing="-9999"],WDIR[unit="degrees" missing="-9999"],PSL[unit="Pa" 
> > missing="-9999"],ALTI[unit="Pa" missing="-9999"],TD[unit="Celsius" 
> > missing="-9999"]
> >
> > Cheers!
> >
> > Sean
> >
> > > Sean,
> > >
> > > Thank you for taking a look.  Also, I didn't know about the "Mesowest 
> > > Chooser", nor the plugin category.  This is excellent!  Maybe I need a 
> > > IDV tutorial someday.
> > >
> > > Patrick
> > > ________________________________________
> > > From: Unidata IDV Support [address@hidden]
> > > Sent: Monday, July 23, 2012 4:30 PM
> > > To: Patrick C. Campbell
> > > Cc: address@hidden
> > > Subject: [IDV #YHN-171651]: Loading Point Data File: 
> > > java.lang.NullPointerException
> > >
> > > Greetings Patrick,
> > >
> > > I'll be happy to take a look at this. However, did you know that the IDV 
> > > has a MesoWest
> > > data chooser plugin available? If you click "Tools -> Plugin Manager" and 
> > > select the
> > > "Mesowest Chooser" from the "Data Sources" plugin category, you'll be 
> > > able to load
> > > Mesowest data from the Data Choosers interface on the IDV Dashboard.
> > >
> > > Cheers,
> > >
> > > Sean
> > >
> > > > Full Name: Patrick Campbell
> > > > Email Address: address@hidden
> > > > Organization: University of Wyoming
> > > > Package Version: 3.0u2 build date:2012-02-10 17:21 UTC
> > > > Operating System: Windows 7
> > > > Hardware: Java: home: C:\Program Files\IDV_3.0u2\jre version: 1.6.0_20 
> > > > j3d:1.5.2 fcs (build4)
> > > > Description of problem: Hello,
> > > >
> > > > Below is the error I am receiving when trying to load a simple point 
> > > > data file.
> > > >
> > > > There was an error loading the data:
> > > > java.lang.NullPointerException
> > > >
> > > > I downloaded the data file in .xls format from the Mesowest website, 
> > > > and then changed the extension to a .csv format.  Subsequently, I 
> > > > manipulated the file to match what I thought was a suitable format.  
> > > > Please see the attached point data file.  I would appreciate any input 
> > > > on this matter.
> > > >
> > > > Regards,
> > > >
> > > > Patrick Campbell
> > > >
> > > > There was an error loading the data:
> > > > java.lang.NullPointerException
> > > >
> > > > ******************
> > > > Stack trace:
> > > > java.lang.NullPointerException
> > > > at visad.Tuple.buildTupleType(Tuple.java:170)
> > > > at 
> > > > ucar.unidata.data.point.TextPointDataSource.makePointObs(TextPointDataSource.java:2105)
> > > > at 
> > > > ucar.unidata.data.point.TextPointDataSource.makeObs(TextPointDataSource.java:656)
> > > > at 
> > > > ucar.unidata.data.point.TextPointDataSource.makeObs(TextPointDataSource.java:479)
> > > > at 
> > > > ucar.unidata.data.point.TextPointDataSource.getSample(TextPointDataSource.java:2518)
> > > > at 
> > > > ucar.unidata.data.point.PointDataSource.doMakeDataChoices(PointDataSource.java:939)
> > > > at 
> > > > ucar.unidata.data.point.TextPointDataSource.doMakeDataChoices(TextPointDataSource.java:2526)
> > > > at 
> > > > ucar.unidata.data.DataSourceImpl.getDataChoices(DataSourceImpl.java:1839)
> > > > at ucar.unidata.data.DataManager.createDataSource(DataManager.java:1579)
> > > > 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:1062)
> > > > at ucar.unidata.util.Misc$3.run(Misc.java:1090)
> > > >
> > > >
> > > >
> > >
> > >
> > > Ticket Details
> > > ===================
> > > Ticket ID: YHN-171651
> > > Department: Support IDV
> > > Priority: Normal
> > > Status: Open
> > >
> > >
> > >
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: YHN-171651
> > Department: Support IDV
> > Priority: Normal
> > Status: Closed
> >
> >
> >
> 


Ticket Details
===================
Ticket ID: YHN-171651
Department: Support IDV
Priority: Normal
Status: Open