Re: [ROOT] Problem using new Branch() with TString?

From: Rene Brun (Rene.Brun@cern.ch)
Date: Fri Jun 08 2001 - 22:39:44 MEST


Hi Christian,

Let me suggest two things:
 1- could you try with the version 3.01/5 now released including the
   version for PPPLinux, thanks to Damir).
 2- if the problem persists, prepare a tar file with a very small subset
  of your classes such that I can reproduce the problem.

Note that, as I explained in a previous mail, we will not have frequent
access to the Internet in the coming 10 days.

Rene Brun

On Fri, 8 Jun 2001 cstrato@EUnet.at wrote:

> 
> Dear Rene, dear Rooters
> 
> In my first root file I store a tree with one branch that addresses a
> class,
> which is derived from TNamed, but contains as member variables two
> TStrings
> and a couple of integer variables. Thus I had to set the splitlevel to
> zero
> in my first library in earlier versions of root.
> 
> My second library creates a new root file and stores a couple of trees
> with
> branches containing only integers and doubles. However, it accesses the
> tree
> from the first root file to get some data.
> 
> This second library works fine as long as it accessed the first root
> file
> created with the old Tree::Branch() function. However, now I have
> recreated
> the first root file, which uses now the new Tree::Branch function (since
> 
> I am using now 3.01/02). Now the second library crashes with a
> "segmentation
> violation".
> 
> After setting "Tree->SetBranchStyle(0)" in my first library for the
> branch
> containing TStrings and integers, everything works fine again. It seems
> that
> simply setting split=0 in the new Branch() is not enough.
> 
> My question now is:
> Why do I have to use BranchOld() when my class contains TStrings?
> 
> My system: PowerBook running LinuxPPC 2000, root 3.01/02.
> 
> Thank you in advance for your help.
> 
> Best regards
> Christian
> ----------------------------------
> C.h.r.i.s.t.i.a.n  S.t.r.a.t.o.w.a
> V.i.e.n.n.a,  A.u.s.t.r.i.a
> 
> 



This archive was generated by hypermail 2b29 : Tue Jan 01 2002 - 17:50:49 MET