Weird Type casting

ROOT
1

I’m trying to get a tree out of o root file, but it doesn’t work at all. I tried to do this with the interpreter and it works fine, but when i try to do it visual c++ 6 it acts weirdly. Here is what i done and what happens:

TTree *tree =(TTree *)(gDirectory->Get(“h51”));

This should work out fine i hoped but when i print it (tree->Print()) this is the result:

Error in TBuffer::CheckByteCount: object of class TNamed read too few bytes: 2
6 instead of 2103413
Warning in TBuffer::CheckByteCount: TNamed::Streamer() not in sync with data o
n file, fix Streamer()
OBJ: TNamed :heart:h51 Atl

Now it’s a TNamed object, how could this happen?

2

Hi,

This is usually happens when you have not linked against the libTree library.

Cheers,
Philippe.

3

Thanks for the answer Phillippe, you are awesome.

Anyhow, I actually already added it into the worksapce. Do i need to do anything else than that?

4

Hi,
if adding libTree to the project doesn’t help you should add the libraries to your link line. See the second half of http://root.cern.ch/phpBB2/viewtopic.php?t=1640.
Axel.