[hdf-forum] H5Dset_extent and maxdims

[Francesc Alted]

Hi Pedro,

A Tuesday 07 October 2008, Pedro Vicente escrigué:
> Hi Francesc
>
> At 05:46 AM 10/7/2008, Francesc Alted wrote:
> >Hi,
> >
> >I'm trying to wrap the H5Dset_extent call, and I have a question. 
> > In the current docs, one can read:
> >
> >"""
> > This function can be applied to the following datasets:
> >
> >    * Any dataset with unlimited dimensions
> >    * A dataset with fixed dimensions if the new dimension sizes are
> >less than the maximum sizes set with maxdims (see H5Screate_simple)
> >"""
> >
> >(http://www.hdfgroup.org/HDF5/doc/RM/RM_H5D.html#Dataset-SetExtent),
> >
> >However, when I try to set a size larger than maximum against a
> > dataset with fixed dimensions, the H5Dset_extent call succeeds and
> > effectively *enlarges* the dimension (contrarily to what
> > documentation is saying).
>
> this should not happen, it is not allowed to set a size larger than
> the initially set maximum in a dataset with fixed dimensions
>
> the docs are correct
>
> can you send us a sample program ?

I've tried to reproduce the problem with the sample program, but I 
can't :-/  With the attached program, I get:

$ ./h5_set_extent
HDF5-DIAG: Error detected in HDF5 (1.8.1) thread 0:
  #000: H5D.c line 1007 in H5Dset_extent(): unable to set extend dataset
    major: Dataset
    minor: Unable to initialize object
  #001: H5Dint.c line 2472 in H5D_set_extent(): unable to modify size of 
data space
    major: Dataset
    minor: Unable to initialize object
  #002: H5S.c line 1791 in H5S_set_extent(): dimension cannot be 
modified
    major: Invalid arguments to routine
    minor: Bad value

in both 1.6.5 and 1.8.1, so obviously I made some mistake in my earlier 
tests.

Sorry for the noise,

-- 
Francesc Alted
Freelance developer
Tel +34-964-282-249
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