Re: [ROOT] Re: ROOT] LAST CALL for comments before closing ROOT version 3.02

From: Nick van Eijndhoven (Nick@phys.uu.nl)
Date: Tue Dec 11 2001 - 09:24:57 MET


Dear ROOTers,
I am also experiencing problems with the I/O in version 3.02/06.
Somehow writing of instances of one of my private classes fails with
3.02/06 using the new schema evolution, whereas with the old streamer
method (i.e. no "+" in the Linkdef.h) everything works correctly.
I get the impression that the problem(s) are related to TObject::Clone(),
which uses the I/O streamers as far as I understnad. 
I am still investigating things, but I also think that it would be
better to wait a bit before making 3.02/06 the pro version.

                                                   Cheers,
                                                    Nick.

-- 
Dr. Nick van Eijndhoven mailto:nick@phys.uu.nl http://www.phys.uu.nl/~nick
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Valeri Fine wrote:
> 
> Hello Rene,
> 
> > We intend to release Root version 3.02/06 this week. This will be the PRO
> > release.
> 
>   He have discovered several problems with the last version of ROOT from CVS
> 
>    1. We can not read back our files written half year ago (with ROOT 3.00.06)
>        We have not had any problem to read them with ROOT versions 3.02.00 / 01
>    2. We can not use TChain to read several TTrees' in row  (See Bill Love's report)
>        The macro crashes occasionally
>    3. We can not read the new files with  TVolume objects,
>         but we can read the old versions of there files though.
> 
>   We are working to understand the reasons of these new problems and will appreciate you
>   will wait a little with your release.
> 
> Have you any idea what has happened with ROOT i/o recently, that  may have affected the
> backward compatibility ?
> 
>     With my regards, Valeri
> -----
> Dr.Valeri Fine
> STAR/US Atlas                                    E-mail: fine@bnl.gov
> Brookhaven National Lab                   Phone: +1 631 344 7806
> Upton, NY 11973-5000                       FAX:     +1 631 344 4206
> USA



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