reading a TTree with a different TTree

Dear Rene,

I have a problem concerning about reading a TTree with a slightly different TTree.

Let me just simplify the problem as below: 1. I have 2 TTree, namely tA and tB. They are different just because tB have some additional variables. 2. I have a data file using tA to stroe my data. 3. I use tB to read the data file.

My question is :
Will there be any mistakes happening?
I am worring about the TBranch::SetAddress( ) will be misfunctioning because of the additional variables.

Thanks a lot!

Best Regards,
Xianguo

-- 
Take flight into the sky, beyond the moon, beyond my mind.

Xianguo LU
Physics Department, Peking University
Beijing, China
Tel: 0086-10-62753888(o)