Hi Ingo, you are talking about automatic scheama evolution of Streamer's We in STAR, have made some ROOT I/O modifications and we have this schema evolution working. Right now, we are testing it in RHIC data taking and production. I hope in a month it will be tested enough, and we will propose it to ROOT team. We have already discussed it with Rene. Victor Ingo Froehlich wrote: > > Hello, > > we added some data members in a class, but now we are not able to read the > old root trees. The only hint I found in the digests is to add some lines > in the streamer function like: > if (R__v > 1) { R__b >> newdata;} > > But I think the streamer function is created automatically, so I have to > add it after the creation of EventDict.cpp, each? Or is it possible to do > this version management also automatically? > > Thanks for your help, Ingo > > -- > Ingo Froehlich, II. Physikalisches Institut, Universitaet Giessen > Heinrich-Buff-Ring 16, D-35392 Giessen | Tel.: 0641 - 99 33250 > EMail: Ingo.Froehlich@exp2.physik.uni-giessen.de | Fax : 0641 - 99 33209 > Sekretariat II. Physik: 0641 - 99 33261 | :-) -- Victor M. Perevoztchikov perev@bnl.gov perev@vxcern.cern.ch Brookhaven National Laboratory MS 510A PO Box 5000 Upton NY 11973-5000 tel office : 631-344-7894; fax 631-344-4206; home 631-345-2690
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