[ROOT] TChain does not reflect new root files in Makeclass("....");

From: zaldy (zaldy@neutrino.kek.jp)
Date: Fri Aug 15 2003 - 04:18:12 MEST 

Dear Rooters,

I found a strange behaviour of TChain. Let me describe it.

I have about 2500 root files and place it at directory 
  ../Data_analysis/SelectedPedRootFiles

at directory ../Data_analysis/src 
i did
 
root[0]Tchain cc("PedTree");
root[1]cc.add("../SelectedPedRootFiles/*.root");
root[2]PedTree->MakeClass("TRootPedSelected");
then an initial code is created.

Now I have additional root (about 800 root files ) files and I wanted to 
add them on same directory "../Data_analysis/SelectedPedRootFiles". 
The new root files are exacly same tree name  structure. And I place the 
(new root files) in the same directory
   ../Data_analysis/SelectedPedRootFiles

In this case I have to regenerate a new TRootPedSelected.C and 
TRootPedSelected.h files via PedTree->MakeClass("TRootPedSelected);
to reflect the new rootfiles.
So at "../Data_analysis/src" I remove the file name "TRootPedSelected.*"
so as not to be in conflict with the new one.

at directory ../Data_analysis/src I repeated the procedure as before.
root[0]Tchain cc("PedTree");
root[1]cc.add("../SelectedPedRootFiles/*.root");
root[2]PedTree->MakeClass("TRootPedSelected");

The strange this is this: the new root files are not included in the 
chain.
------------------->

Now, I move all the root files this time to a new currently created 
directory ../Data_analysis/investigate
Then at ../Data_analysis/src I did repeated the procedure again.
....
root[1]cc.Add("../investigate/*.root");
.....
Result is: the new root files are reflected.

------------------>

Now I want to use the old dir name: SelectedPedRootFiles (my preference)

So at dir ../Data_analysis , i did;
 $rm -r SelectedPedRootFiles
 $mkdir SelectedPedRootFiles

then mv all my rootfiles(including the new) 
from
../Data_analysis/investigate 
to
../Data_analysis/SelectedPedRootFiles

NOTE: Situation now is same as before, only that I deleted the dir 
SelectedPedRootFiles, then recreate again.


Now at dir ../Data_analysis/src
I did
root[0]Tchain cc("PedTree");
root[1]cc.add("../SelectedPedRootFiles/*.root");
root[2]PedTree->MakeClass("TRootPedSelected);
then a initial code is created.

Result: The new root files and the old ones are reflected.

------------------>
Questions:
 1. Is TChain sensetive to dates?
 2. How do we explain this behaviour? 
 3. How do we correct this without deleting and remaking directory? and,
 4  Is this a bug?

PS. root version 3.05/05 6 Aug 2003
    gcc 3.2.2 RedHat 9.0

Thank you.

-- 

--------------------------------------------------------
                   Zaldy A. Nawang 
                   PS Users Room 2
                   Yon Gokan, 
                   E362, Neutrino Group, 
                   IPNS, KEK, 
                   Japan 
                    
                   e-mail: zaldy@neutrino.kek.jp
                   Tel. No. : (81) 029864 - 5387
--------------------------------------------------------

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