Fwd: Re: [Pytables-users] Unable to remove all rows in a table

[Francesc A. <fa...@ca...>]

The new SpamAssassin put to work recently to filter spam in all
sourceforce discussions lists is giving me problems lately by
insisting in that my messages are spam.=20

Well, sorry to bother you with this "spam". I don't think it is really
so, but my opinion is probably biased compared with SpamAssassin ;)

Hope this time works,

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Subject: Re: [Pytables-users] Unable to remove all rows in a table
Date: Divendres 04 Febrer 2005 13:13
=46rom: Francesc Altet <fa...@ca...>
To: pyt...@li...
Cc: Ashley Walsh <ash...@sy...>

Hi,

You're hitting a known bug in HDF5. I've reported it, together with a
C program that exposes the bug (I'm attaching it) to the HDF5 people
last December, and they responded (12-01-04):

"""
I talked to the developer about this... Truncating a dataset is not
allowed currently.  I will enter a bug report for this so that we discuss
this issue, and for now we will give an error when a user tries
to shrink the size of a dataset (rather than crashing).
"""

I don't know anything new about that. You may want to complain
yourself to the HDF5 crew, if this problem is important enough to you.

Cheers,

A Divendres 04 Febrer 2005 06:16, Ashley Walsh va escriure:
> Hi,
>
> I'm having some problems with Table.removeRows(), which doesn't want to
> remove all the rows from a table.  Python crashes if I try to remove
> all the rows from a table:
>
>      table.removeRows(0, table.nrows)
>
> MacOSX crashes with a bus error, while Windows 2000 has a memory error
> and prints a message about "HDF5: inifinite loop closing library".
>
> I did try the latest snapshot (pytables-20050204.tar.gz) on MacOSX, and
> the problem didn't go away.
>
> Burrowing down makes it look like the problem is in H5TBdelete_record
> in H5TB.c, but then things started getting too hard for me!
>
> Cheers,
> Ashley
>
>
>
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