[petsc-users] Question about PetscViewerHDF5SetTimestep usage

[Sajid Ali]

Hi Matthew,

Thanks for the info. Could you give a specific commit that I should rebuild
PETSc with ? I’m currently building with
commit=83593104eb216a023c00ab8a3f9897d55e531412'.


On Fri, Dec 14, 2018 at 12:56 PM Matthew Knepley <knepley at gmail.com> wrote:

> I believe this is now fixed in 'master', It was a bug in HDF5 attribute
> creation.
>
>   Thanks,
>
>     Matt
>
> On Fri, Dec 14, 2018 at 1:16 PM Sajid Ali via petsc-users <
> petsc-users at mcs.anl.gov> wrote:
>
>> Hi,
>>
>> I have a question about PetscViewerHDF5SetTimestep usage.
>>
>> I have tried the following minimal example which tries to write a vector
>> twice to an hdf5 file and it fails with the error message shown below.
>>
>> Example : https://pastebin.com/cAeZsUgA
>>
>> Error :
>>
>> writing vector in hdf5 to vector.dat ...
>> HDF5-DIAG: Error detected in HDF5 (1.10.4) MPI-process 0:
>>   #000: H5A.c line 279 in H5Acreate2(): unable to create attribute
>>     major: Attribute
>>     minor: Unable to initialize object
>>   #001: H5Aint.c line 323 in H5A__create(): unable to create attribute
>>     major: Attribute
>>     minor: Unable to create file
>>   #002: H5Aint.c line 167 in H5A__create_common(): attribute already
>> exists
>>     major: Attribute
>>     minor: Object already exists
>> [0]PETSC ERROR: --------------------- Error Message
>> --------------------------------------------------------------
>> [0]PETSC ERROR: Error in external library
>> [0]PETSC ERROR: Error in HDF5 call H5Acreate2() Status -1
>> [0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html
>> for trouble shooting.
>> [0]PETSC ERROR: Petsc Release Version 3.10.2, unknown
>>
>>
>> The error is related to the second VecView after setting the timestep to
>> 1. Am i doing something wrong ?
>>
>> Thank You,
>> Sajid Ali
>> Applied Physics
>> Northwestern University
>>
>
>
> --
> What most experimenters take for granted before they begin their
> experiments is infinitely more interesting than any results to which their
> experiments lead.
> -- Norbert Wiener
>
> https://www.cse.buffalo.edu/~knepley/
> <http://www.cse.buffalo.edu/~knepley/>
>


-- 
Sajid Ali
Applied Physics
Northwestern University
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