CopyTree'ing large TTrees

Hello roottalk,

I'm trying to select the records from the TTree having a specific values of several leaves.
I have TTree* CALIWAVE being of enormous size (smth like 40 millions of records), but I need only ~1000 of them to be selected.

When I say
CALIWAVE->Scan("Amplitude","FT==0 && slot==2 && channel==1"); I get the array of 768 records printed out, and everything is fine and quick.

But when I say
TTree* tmp = CALIWAVE->CopyTree("FT==0 && slot==2 && channel==1"); to get the access to the leaves of the selected records from my script, I get the bad_alloc exception.
That happens both in CINT and in my C program using ROOT libraries.

Why is it so and how can I manage to do what I want? :)

Thank you in advance.

--
Best regards,
Ilya Orlov.


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