xml string attribute write error

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xml string attribute write error

"André Walker-Loud <walksloud@gmail.com>"
Greetings all,

A colleague and I are getting an error when trying to write a string, which is fully formed xml snippet, as an attribute in a hdf5 file.

Checks we have done:

1 - manually write the string and with .compare, this manual string matches exactly the string we have read from an xml buffer.

1a - the manual string can be written to an attribute

1b - the original string raises an error when we write

2 - we have used .copy to make a new copy of the string from the xml buffer

2a - this copy also fails to write with the same error

3 - we removed all new-line characters from the string - this did not help

4 - we tried the .substr method to chop the string to small pieces, this also did not help (all pieces failed to write)

5 - we tried the first 5 characters of the string, which do not have any special characters - still fails

The fact that 1a succeeds means we are probably missing something simple.

The error is

HDF5-DIAG: Error detected in HDF5 (1.8.16) MPI-process 1:
  #000: H5A.c line 334 in H5Acreate_by_name(): no attribute name
    major: Invalid arguments to routine
    minor: Bad value


I am hoping someone here has had and fixed the same problem, as we are very stuck.

Thanks,
Andre






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Re: xml string attribute write error

Jager, Gerco de
Hi Andre,


I try my best from the available information (no code example provided). I suspect that the argument provided to the H5Acreate_by_name call is either not provided or not recognised as a valid name for an attribute. So you have to check that you provide a buffer containing a valid and not-yet-existing name for the attribute.
Once you've created the attribute you should be able to write the xml string to it using H5Awrite().

Kind regards,
Gerco



Gerco de Jager  | Software Engineer | MARIN Software Group
MARIN | T +31 317 49 33 51 | mailto:[hidden email] | http://www.marin.nl

MARIN news: http://www.marin.nl/web/News/News-items/Join-the-Floating-Future-seminar-March-7-2018.htm

-----Original Message-----
From: Hdf-forum [mailto:[hidden email]] On Behalf Of gmail
Sent: donderdag 11 januari 2018 2:09
To: [hidden email]
Subject: [Hdf-forum] xml string attribute write error

Greetings all,

A colleague and I are getting an error when trying to write a string, which is fully formed xml snippet, as an attribute in a hdf5 file.

Checks we have done:

1 - manually write the string and with .compare, this manual string matches exactly the string we have read from an xml buffer.

1a - the manual string can be written to an attribute

1b - the original string raises an error when we write

2 - we have used .copy to make a new copy of the string from the xml buffer

2a - this copy also fails to write with the same error

3 - we removed all new-line characters from the string - this did not help

4 - we tried the .substr method to chop the string to small pieces, this also did not help (all pieces failed to write)

5 - we tried the first 5 characters of the string, which do not have any special characters - still fails

The fact that 1a succeeds means we are probably missing something simple.

The error is

HDF5-DIAG: Error detected in HDF5 (1.8.16) MPI-process 1:
  #000: H5A.c line 334 in H5Acreate_by_name(): no attribute name
    major: Invalid arguments to routine
    minor: Bad value


I am hoping someone here has had and fixed the same problem, as we are very stuck.

Thanks,
Andre






_______________________________________________
Hdf-forum is for HDF software users discussion.
[hidden email]
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5
_______________________________________________
Hdf-forum is for HDF software users discussion.
[hidden email]
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
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Re: xml string attribute write error

Gerd Heber
In reply to this post by "André Walker-Loud <walksloud@gmail.com>"
A simple example that reproduces the error goes a long way.
I can't follow your description.
Please include a description of your environment (OS, compiler, etc.)
The error message suggests that you are using MPI.
Are you using parallel HDF5? If so, how?

G.

-----Original Message-----
From: Hdf-forum [mailto:[hidden email]] On Behalf Of gmail
Sent: Wednesday, January 10, 2018 7:09 PM
To: [hidden email]
Subject: [Hdf-forum] xml string attribute write error

Greetings all,

A colleague and I are getting an error when trying to write a string, which is fully formed xml snippet, as an attribute in a hdf5 file.

Checks we have done:

1 - manually write the string and with .compare, this manual string matches exactly the string we have read from an xml buffer.

1a - the manual string can be written to an attribute

1b - the original string raises an error when we write

2 - we have used .copy to make a new copy of the string from the xml buffer

2a - this copy also fails to write with the same error

3 - we removed all new-line characters from the string - this did not help

4 - we tried the .substr method to chop the string to small pieces, this also did not help (all pieces failed to write)

5 - we tried the first 5 characters of the string, which do not have any special characters - still fails

The fact that 1a succeeds means we are probably missing something simple.

The error is

HDF5-DIAG: Error detected in HDF5 (1.8.16) MPI-process 1:
  #000: H5A.c line 334 in H5Acreate_by_name(): no attribute name
    major: Invalid arguments to routine
    minor: Bad value


I am hoping someone here has had and fixed the same problem, as we are very stuck.

Thanks,
Andre






_______________________________________________
Hdf-forum is for HDF software users discussion.
[hidden email]
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

_______________________________________________
Hdf-forum is for HDF software users discussion.
[hidden email]
http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5