Re: File I/O

From: Rene Brun <>
Date: Wed, 6 Jul 2005 21:59:24 +0200 (MEST)

Hi Thomas,

We guarantee back compatibility, ie reading files written with an old version of ROOT. The inverse is more tricky. We have made an effort so far to support forward compatibility. This did not happen when we started version 4 (to support correctly the bool type). So you cannot read files written with version 4 with older version like 3.05.

Could you give more details on the problems you have experienced in moving to version 4?

Rene Brun

Tue, 5 Jul 2005, Thomas Bretz wrote:

> Hi,
> is there a simple way to write root-files with root 4.04/02 which are
> readable with older versions (3.10/02 or 3.05/07) We have a lot of files
> written with the new version, but a lot of people having Software which
> doesn't work with the newer version anymore (for several reasons).
> Thanks,
> Thomas.
Received on Wed Jul 06 2005 - 21:59:28 MEST

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