O maybe thats the reason. We are using Version 4.2 Release 5.


On Tue, Mar 19, 2013 at 12:50 PM, Peter Cao <x...@hdfgroup.org> wrote:

>  Hi Sudipta,
>
> I downloaded and tried the file. It worked OK.
>
> I am using the latest version of hdf4.
> hrepack -V
> hrepack, HDF Version 4.2 Release 9-post0, February 25, 2013
>
> What version did you use? We had this issue with older version of hdf4.
>
> Thanks
> --pc
>
>
> On 3/19/2013 10:38 AM, sudipta sarkar wrote:
>
>   Hi Peter
> Sorry I should have clarified earlier. You will not get this problem from
> any of the files downloaded from the public site. We are facing this error
> for the files that are being generated for the upcoming Collection 6
> product of MODIS. I had sent a ftp link to Barbara from your organization
> earlier to download one such file. I am forwarding the same link to you as
> well:
>
>
> *You have 10 days from 03-19-2013 to download the file(s) from the
> following URL:*
>
> *https://webdrive.gsfc.nasa.gov/shortauth/sudipta.sarkar/gz005oC*
>
> *Please use the following to login:*
>
> *username = barbara_hdf
> password = hdfmodis*
>
>  If you download the file from this link, you should get the hrepack error
> that I mentioned earlier.
>  Let me know if  you face any problem in downloading the file.
>  Thanks
>
>
>
> On Tue, Mar 19, 2013 at 11:34 AM, Peter Cao <x...@hdfgroup.org> wrote:
>
>>  Hi Sudipta,
>>
>> I downloaded a similar file,
>> MOD13Q1.A2003001.h12v09.005.2007261172941.hdf,
>> from http://e4ftl01.cr.usgs.gov/MOLT/MOD13Q1.005/2003.01.01/
>>
>> I used the same option as you did but I could not reproduce the problem.
>> Everything
>> worked fine. The new file is a little bigger than the original one since
>> the original file
>> was compressed with GZIP level 5.
>>
>> Could you download the file and try again? Just want to make sure the
>> file is not corrupted
>> along the way.
>>
>> Thanks
>> --pc
>>
>>
>>
>> On 3/18/2013 12:30 PM, sudipta sarkar wrote:
>>
>>  Hi All,
>> I am facing a strange problem related to HDF tool "hrepack".
>> I am trying to use the hrepack tool to copy and compress a particular
>> MODIS dataset as follows:
>>
>> hrepack -i MOD13Q1.A2003001.h12v09.006.201029312065.hdf -o test.hdf.temp
>> -t '*:GZIP 4'
>>
>> where MOD13Q1.A2003001.h12v09.006.201029312065.hdf is a HDF4 MODIS
>> dataset.
>>
>> When I run the tool on the above file that has 12 SDS  inside, the tool
>> throws up an error:
>>
>> "Failed to check empty SDS <MODIS_Grid_16DAY_250m_500m_VI/Data
>> Fields/250m 16 days view zenith angle>"
>>
>> The strange thing is that the particular SDS "250m 16 days view zenith
>> angle" is not empty at all and is filled with valid data. I can open that
>> SDS in HDFView or in ENVI. I can also run other in-house hdf tools on that
>> file and sds and yet hrepack complains about it being empty and cannot
>> process this and all similar files.
>>
>> I am not even sure as to what to look for and what is wrong.
>> Any suggestions or comments from anyone will be most welcome.
>> Thanks
>>
>>
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>>
>>
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>
>
> _______________________________________________
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>
>
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> Hdf-forum@hdfgroup.org
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