Re: [TMVA-users] Bad numerical expression

[Zinonas Z. <zin...@gm...>]

Hi Peter,
what you guessed is correct. Thanks.

On 03/14/2013 10:17 AM, Peter Speckmayer wrote:
> Hi Zinonas,
>
> Please check if a variable of that exact name is present in all the 
> trees you've added to the factory. What does ROOT tell you if you just 
> load the trees and access this variable (e.g. with 
> tree->Scan("myvariable"); )?
>
> cheers,
> Peter
>
>
>
> 2013/3/12 Zinonas Zinonos <zin...@gm... <mailto:zin...@gm...>>
>
>     Hi,
>
>     I often get this fatal error
>
>     Error in <TTreeFormula::Compile>:  Bad numerical expression :
>     "myvariable"
>     --- <FATAL> DataSetFactory           : Expression myvariable could not
>     be resolved to a valid formula.
>     ***> abort program execution
>
>     when adding variables to the factory
>
>     factory->AddVariable( "myvariable", 'F');
>
>     Why? My fault?
>
>     Thanks!
>     Zinonas
>
>     PS I put a copy of a working tree in my lxplus public area:
>     ~zenon/public/data.215063.root . You can try with BDT and the variable
>     (double) "MMC_resonance_x0".
>
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