Re: decoders] Bufr Decode Exception

On Thu, 13 Mar 2008, Tatsuya Noyori wrote:

> Hello,
>
> I am tring to decode a bufr file and have had a Exception. The
> exception is as follows:
>
>      D:\netcdfAll-2.2.22>java -Xmx256m ucar.bufr.BufrIndexer
> ISSM41_RJTD_120000_KAA.bin  >ISSM41_RJTD_120000_KAA.bin.indexer.txt
>      Exception in thread "main" java.lang.NullPointerException
>              at ucar.bufr.BufrIndexer.writeFileIndex(BufrIndexer.java:327)
>              at ucar.bufr.BufrIndexer.main(BufrIndexer.java:494)
>
> And the index file that BufrIndexer outputs is as follows:
>
>      D:\netcdfAll-2.2.22> cat ISSM41_RJTD_120000_KAA.bin.indexer.txt
>      Unknown DDS DataType =48
>      type = BUFR
>      bufr_edition = 3
>      location = ISSM41_RJTD_120000_KAA.bin
>      length = 7441
>      created = 2008-03-13T04:45:34Z
>      index_version = 1.1
>      --------------------------------------------------------------------
>
> It seems like a bug. if so, I would appreciate it if unidata team
> would fix the bug.


Tatsuya,

Not a bug...


the DataType=48  in the file is wrong, it can only be values 0,64,128,196:

BUFR Documentation:
Bit 1 = 1 observed data = 0 other data
Bit 2 = 1 compressed data = 0 non-compressed data
Bit 3 - 8 set to zero (reserved)

I even remove 3-8 bit values that resulted in DataType =0 but then
the descriptors were outside the range ie 0-48-50, in table 12 the
highest 0 descriptor is 0-35-

Contact the data provider for more information.



      if( dds.getDataType() == 192 || dds.getDataType() == 64 ) {
         isCompressed = true;
         compressed();
      } else if( dds.getDataType() == 128 || dds.getDataType() == 0 ) {
         isCompressed = false;
         uncompressed();
      } else {
         System.out.println( "Unknown DDS DataType ="+ dds.getDataType() 
);
         return false;

Robb...

> And I am attaching the bufr file that I tried to decode.
>
> Best regards,
>
> --
> Tatsuya Noyori (^o^)/

===============================================================================
Robb Kambic                                Unidata Program Center
Software Engineer III                      Univ. Corp for Atmospheric Research
address@hidden             WWW: http://www.unidata.ucar.edu/
===============================================================================