[ROOT] Warning file not closed or root crash when deleting file

From: cstrato (cstrato@aon.at)
Date: Sun Jun 20 2004 - 16:56:27 MEST

Dear Rooters

I have the following situation:
First I open an existing file "fDataFile" which contains some data 
trees. In a first step I add these trees as friends to a tree "fTree".
Then I create a new file "fFile" where the result tree "atree" should be 
stored. Later, I create the result tree "atree" in a class method.
After filling "atree" I want to add "atree" as friend to fTree, too.
The relevant code fragment of the method looks like this:
    TTree *atree = new TTree(treename, "");
    // fill atree
    fTree->AddFriend(atree->GetName(), fFile->GetName());

In this case AddTree() results in the following message:
Warning in <TFile::Init>: file /Users/cs/ROOT/rootcode/tmp.root probably 
not closed, trying to recover
Info in <TFile::Recover>: /Users/cs/ROOT/rootcode/tmp.root, recovered 
key TTree:Test at address 350
Warning in <TFile::Init>: successfully recovered 1 keys

Nevertheless, everything works fine including the call to the
destructors, where I delete "fDataFile" with "SafeDelete(fDataFile)".

In contrast, when I add "atree" as friend using:
    fTree->AddFriend(atree->GetName(), fFile);
everything works fine until I call the destructors.
When I try to delete "fDataFile" with "SafeDelete(fDataFile)" then
root crashes beyond recovery with "*** Break *** bus error"

However, if I remove "atree" after usage by calling in a different method
then everything works fine again and I can call "SafeDelete(fDataFile)"
in the destructor.

Does anybody have an idea what might be the reason for this behavior?
(I am afraid ths code is too complex to extract a simple macro.)

Thank you in advance
Best regards
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

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