Re: Unexpected TTree cycle numbers

From: Brett Viren <bv_at_bnl.gov>
Date: Mon, 26 Apr 2010 16:34:32 -0400


Hi Rene,

Rene Brun <Rene.Brun_at_cern.ch> writes:

> see TTree::AutoSave

Thanks, this looks like it may be implicated in what I see as the higher cycles only occur in the largest TTree and only after a sufficiently large number of events have been run.

Let me ask another question. When I open the file in a TBrowser I see two copies of my tree (with cycle numbers ";3" and ";4"). Both trees hold identical data. The AutoSave documentation says:

   Once the key with the tree header has been written, the previous cycle    (if any) is deleted.

This seems to say I should not see two trees. Any ideas as to what might be keeping the older ";3" cycle around?

BTW, this is with ROOT 5.22.00a.

Thanks,
-Brett.

Received on Mon Apr 26 2010 - 22:34:40 CEST

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