Re: BrRdoModuleBB

From: I. G. Bearden (bearden@hehi03.nbi.dk)
Date: Tue Nov 14 2000 - 01:18:38 EST

  • Next message: I. G. Bearden: "Re: BB Vertex."

    "Claus O. E. Jorgensen" wrote:
    
    > Hi Yury and everybody else
    >
    > You're right the crash does not come from the
    > reading of the files, since they are always
    > there, I'm sorry:-) We've found the exact reason:
    > It's a subtlety in compilation from different
    > RedHat distributions. We still suggest that
    > one checks if the file is there before reading
    > data from it. There are two reasons for this:
    >
    > 1) It protects us from these kind of
    > compilation bugs.
    >
    
    This is a good point.
    
    >
    > 2) If none of the files are present (for some
    > wierd reason) you don't get any error messages,
    > but only wrong calibration parameters.
    >
    
    This is an absolutely critical point.  If for some reason a calibration
    file is not
    found, the program should STOP execution, otherwise we get dubious
    results.
    In the particular case of the BB, this would not neccessarily be easy to
    see, since
    (at least in the repository version) the only quantities stored are BB-Z
    and BBt0.
    I suppose that these could appear reasonable even with an unreasonable
    calibration.
    
    
    >
    > Cheers,
    >   Claus Jorgensen & Djamel Ouerdane
    
    About the RedHat versions....what is the current 'default' version at
    BNL.  I have seen mails
    from Konstantin about RH7.0, but I guess the rcf linux machines run
    6.1.  We at NBI have
    5.2, 6.1 and 6.2, and will wait until at least 7.1 to upgrade.
    So...maybe 7.0 is  a bit premature?
    Cheers,
    
    --
    Ian--------------------------------------------------------------------
    | I.G. Bearden                                                         |
    | Niels Bohr Institute Tb 3    email:      bearden@nbi.dk              |
    | Blegdamsvej 17               phone:      (+45) 35 32 53 23           |
    | København Ø                    FAX:      (+45) 31 42 10 16           |
    | Danmark                                                              |
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