creating and writing to a subgroup fails

Hdf-forum archives
1

Hi Folks:

Im trying to write data to a subgroup /foo/bar.

groups created like this:
_group = Group(_file.createGroup("/foo"));
_subgroup = Group(_file.createGroup("/bar"));

i set some attributes on _group, then try to open a dataset:
const H5std_string dataset_name("/foo/bar/test");

Then i know it fails here:
    _dataset = _file.createDataSet(dataset_name,
                                                PredType::NATIVE_DOUBLE,
mspace, cparms);

Note, without the subgroup "bar", this works fine (creates and writes to
the file under group 'foo').

Here is the failure:

HDF5-DIAG: Error detected in HDF5 (1.8.16) thread 0:
  #000: H5D.c line 194 in H5Dcreate2(): unable to create dataset
    major: Dataset
    minor: Unable to initialize object
  #001: H5Dint.c line 453 in H5D__create_named(): unable to create and link
to dataset
    major: Dataset
    minor: Unable to initialize object
  #002: H5L.c line 1638 in H5L_link_object(): unable to create new link to
object
    major: Links
    minor: Unable to initialize object
  #003: H5L.c line 1882 in H5L_create_real(): can't insert link
    major: Symbol table
    minor: Unable to insert object
  #004: H5Gtraverse.c line 861 in H5G_traverse(): internal path traversal
failed
    major: Symbol table
    minor: Object not found
  #005: H5Gtraverse.c line 755 in H5G_traverse_real(): component not found
    major: Symbol table
    minor: Object not found
terminate called after throwing an instance of 'H5::FileIException'
*** Aborted

Any thoughts?

Thanks,
Mike

···

--

"It is difficult to say what is impossible, for the dream of yesterday is
the hope of today and the reality of tomorrow--Robert H. Goddard."

2

Hi Michael,
Based on your code, you're creating two top level groups, not a sub-group
as you want to. Presumably it should read

_subgroup = Group(_group.createGroup("/bar"));

Because at the moment your code says _file.createGroup(). Hence the dataset
creation fails.

Cheers,
Martijn

···

El 6/8/2016 5:14, "Michael Barrucco" <mbarrucco@gmail.com> escribió:

Hi Folks:

Im trying to write data to a subgroup /foo/bar.

groups created like this:
_group = Group(_file.createGroup("/foo"));
_subgroup = Group(_file.createGroup("/bar"));

i set some attributes on _group, then try to open a dataset:
const H5std_string dataset_name("/foo/bar/test");

Then i know it fails here:
    _dataset = _file.createDataSet(dataset_name,
                                                PredType::NATIVE_DOUBLE,
mspace, cparms);

Note, without the subgroup "bar", this works fine (creates and writes to
the file under group 'foo').

Here is the failure:

HDF5-DIAG: Error detected in HDF5 (1.8.16) thread 0:
  #000: H5D.c line 194 in H5Dcreate2(): unable to create dataset
    major: Dataset
    minor: Unable to initialize object
  #001: H5Dint.c line 453 in H5D__create_named(): unable to create and
link to dataset
    major: Dataset
    minor: Unable to initialize object
  #002: H5L.c line 1638 in H5L_link_object(): unable to create new link to
object
    major: Links
    minor: Unable to initialize object
  #003: H5L.c line 1882 in H5L_create_real(): can't insert link
    major: Symbol table
    minor: Unable to insert object
  #004: H5Gtraverse.c line 861 in H5G_traverse(): internal path traversal
failed
    major: Symbol table
    minor: Object not found
  #005: H5Gtraverse.c line 755 in H5G_traverse_real(): component not found
    major: Symbol table
    minor: Object not found
terminate called after throwing an instance of 'H5::FileIException'
*** Aborted

Any thoughts?

Thanks,
Mike

--

"It is difficult to say what is impossible, for the dream of yesterday is
the hope of today and the reality of tomorrow--Robert H. Goddard."

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