[netCDF #JNH-860762]: Problems with CDL/vlen example

Lynton,

> this is some progress. I will be interested to hear the outcome. In much
> of my code development
> debugging work I use Totalview. Do you have access to this or to
> similiar software?

I don't have access to TotalView, but use gdb from the emacs.  I can trace the
problem down to the recursive call nested three deep of H5T_convert() when 
the "datatype conversion failed" error occurs in trying to convert a vlen,
but that doesn't mean it's necessarily an HDF5 error.  I don't know of a
practical way to determine that without writing the equivalent data using just 
HDF5 C calls, and that will take some concentrated time that I hope to find in 
the next week ...

--Russ

> Lynton
> 
> On 09/07/2012 09:14 PM, Unidata netCDF Support wrote:
> > Lynton,
> >
> > The problem has now been simplified to a small C program (attached) that
> > creates a netCDF-4 file with one variable and gets an HDF5 error.  It's
> > not clear yet whether this is caused by a netCDF-4 bug or an HDF5 bug, but
> > we should be able to determine that by testing an equivalent HDF5 program
> > that doesn't use any netCDF-4 calls.  That has yet to be done ...
> >
> > --Russ
> >
> >>> New Client Reply: Problems with CDL/vlen example
> >>>
> >>> thanks Russ,
> >>> this is great news. I will need to schedule some time to get back to 
> >>> finish t
> >>> he work.I cannot do it right away but will get back to it as soon as I 
> >>> can.
> >>> Lynton
> >>>
> >>> -----Original Message-----
> >>> From: Unidata netCDF Support [mailto:address@hidden]
> >>> Sent: 29 August 2012 20:55
> >>> To: Appel, Lynton
> >>> Cc: address@hidden; address@hidden; Appel, Lynton; sa
> >>> address@hidden
> >>> Subject: [netCDF #JNH-860762]: Problems with CDL/vlen example
> >>>
> >>> Hi Lynton,
> >>>
> >>>> Dear Sylwester and Russ,
> >>>> thanks for the enquiry
> >>>> I spent a lot of time on developing an upgraded C++ API that could
> >>>> handle user-defined in a much better way.  The validation process has got
> >>>> somewhat stalled by a bug in the netCDF-C layer or HDF5-layer.
> >>>> Russ is there any news on this?
> >>> Yes, there is as of this afternoon.  The bug that was holding things up
> >>> appears to have been fixed with changes to netCDF-4 or HDF5.  I say "or",
> >>> because at this point, it's difficult to determine whether the fix was in
> >>> the upgrade from HDF5 1.8.8 to 1.8.9 or the netCDF-4 upgrade from 4.1.3
> >>> to 4.2.0, but it works now with the combination netCDF-4 version 4.2.1.1
> >>> and HDF5 version 1.8.9.  The details are in this Jira issue description
> >>> and comments:
> >>>
> >>>    https://www.unidata.ucar.edu/jira/browse/NCF-155
> >>>
> >>> Please try compiling and linking against the new versions and verify 
> >>> whether
> >>> you agree that the bug that was blocking release of your new version of 
> >>> the
> >>> netCDF-4 C++ release is now fixed.  I'm hoping no new bugs affecting that
> >>> code have been introduced ...
> >>>
> >>> --Russ
> >>>
> >>>
> >>>
> >>> Russ Rew                                         UCAR Unidata Program
> >>> address@hidden                      http://www.unidata.ucar.edu
> >>>
> >>>
> >>>
> >>> Ticket Details
> >>> ===================
> >>> Ticket ID: JNH-860762
> >>> Department: Support netCDF
> >>> Priority: Critical
> >>> Status: Closed
> >>>
> >>>
> >>>
> >>> Ticket Details
> >>> ===================
> >>> Ticket ID: JNH-860762
> >>> Department: Support netCDF
> >>> Priority: Critical
> >>> Status: Open
> >>> Link:  
> >>> https://www.unidata.ucar.edu/esupport/staff/index.php?_m=tickets&_a=vi
> >>> ewticket&ticketid=19304
> >>
> > Russ Rew                                         UCAR Unidata Program
> > address@hidden                      http://www.unidata.ucar.edu
> >
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: JNH-860762
> > Department: Support netCDF
> > Priority: Critical
> > Status: Closed
> 
> 
Russ Rew                                         UCAR Unidata Program
address@hidden                      http://www.unidata.ucar.edu



Ticket Details
===================
Ticket ID: JNH-860762
Department: Support netCDF
Priority: Critical
Status: Closed