[ROOT] histogram file merging chokes on large number of files

From: Frank Filthaut (filthaut@hef.kun.nl)
Date: Thu Jan 31 2002 - 09:09:26 MET 

  Dear ROOTers,

I've been happily using the hadd.C macro to merge histogram files.
However, now I have a specific case where I'd like to merge some
800 files. This fails with the message "... Too many open files".

What is the limit? How can I see that? And what can I do about
this without having to split up this procedure in several steps?
Many thanks.
                        Regards,
                         Frank

-----------------------------------------------------------
F. Filthaut
University of Nijmegen, Dept. of Exptl. High Energy Physics
Toernooiveld 1             | Phone: +31-24 365 23 08
6525 ED Nijmegen           | Fax:   +31-24 365 21 91
The Netherlands            | FNAL:  +1-630 840 21 77

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