[gradsusr] GrADS Control File for Array with Spectral Band Dimension

[Jennifer Adams]

This was indeed another bug in the interface for hdf5 grids; the bug was for templated data sets, but has now been fixed. It will be available in the new release. Thanks for reporting it, and for your patience while waiting for the fixes to arrive. 
--Jennifer

On Sep 20, 2013, at 10:15 AM, James E. Johnson wrote:

> On Thursday 19 September 2013 06:11:44 pm James E. Johnson wrote:
>> On Thursday 19 September 2013 04:55:58 pm Jennifer Adams wrote:
>>> First of all, thank you for providing all the information and data I
>>> needed to reproduce the error! The failure of method 1 (using array
>>> indices in the units field of the variable declaration instead of
>>> x,y,z,t,e) is indeed a bug that is unique to the hdf5 data type. The
>>> critical bit of information in the error message from the HDF5 library
>>> was this: "src and dest data spaces have different sizes." In method 1,
>>> the variables are described to GrADS as being only 2-dimensional (i.e.,
>>> not Z-varying) even though they really have 3 varying dimensions, and the
>>> library trips on this deception. The netcdf library is not as fussy. I
>>> will put a fix in version 2.1, but for now you will have to use method 2.
>>> --Jennifer
>> 
>> Thanks Jennifer,
>> 
>> I think there may be another bug. I have a more extensive control file with
>> all the variables from the file. I can successfully display data from the
>> first variable I read, but subsequent variables complain:
>> 
>> HDF5-DIAG: Error detected in HDF5 (1.8.7) thread 0:
>>  #000: H5Shyper.c line 6593 in H5Sselect_hyperslab(): not a data space
>>    major: Invalid arguments to routine
>>    minor: Inappropriate type
>> HDF5 Error: unable to select dataspace hyperslab
>> Data Request Error:  Error for variable 'uvai'
>>  Error ocurred at column 1
>> DISPLAY error:  Invalid expression
>>  Expression = uvai
> 
> One thing I notice is that if I close the control file, and reopen it, then I 
> can read another variable. But it seems GrADS 2.0.2 has a problem somewhere 
> allowing you to read/displaying mutliple variables.
> 
> -----------------------------------------------------------------------------
> | James E. Johnson                   | address:                              |
> | ADNET Systems, Inc.                |  NASA Goddard Space Flight Center     |
> | e-mail: james.johnson at nasa.gov     |  Data and Information Services Center |
> | phone:  301-614-5121               |  Code 610.2, Bldg 32, Room S130G      |
> | fax:    301-614-5268               |  Greenbelt, MD  20771                 |
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--
Jennifer M. Adams
Center for Ocean-Land-Atmosphere Studies (COLA)
111 Research Hall, Mail Stop 2B3
George Mason University
4400 University Drive
Fairfax, VA 22030 





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