Re: problem writing TTree

Dan,

I cannot test your problem without your input data set. However, I strongly suggest to change

   tree = new TTree("data","SPData");
   file = new TFile("temp/SPDAQTree.root","recreate"); for

   file = new TFile("temp/SPDAQTree.root","recreate");    tree = new TTree("data","SPData");

I have a comment on your class rootTree. Your 38 calls to tree->Branch can be replaced by one single call ::)

Rene Brun

Dan Holmes wrote:
> Hi ROOT support,
>
> ..sorry if i missed this in some faqs somewhere..
>
> I have problems with some code that fills and writes a tree. It was
> working ok on slc3/root 5.04, (linked afs version) for many years but
> now i have upgraded to slc4, downloaded binaries (and am trying 5.16,
> 5.18).
>
> I have attached my set of .cpp files (makeTree wraps readData which
> uses the rootTree object). I suspect you don't want to look at any of
> them apart from rootTree.cc.
>
> The whole thing compiles ok.::
> g++ -o makeTree.exe makeTree.cpp `root-config --cflags --libs`
> The problem comes when the destructor to readData is called and
> rootTree class tries to do TTree*->Write(). I get the horrible error
> string attached.
>
> Anyone know what i'm doing wrong or have any pointers??
>
> cheers,
>
> Dan.
Received on Thu Jan 31 2008 - 09:29:08 CET