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Forum: Physics List
Re: None Missing G4Data files (Frank Gaede)
Re: None Re: Missing G4Data files
Re: None Re: Missing G4Data files (Frank Gaede)
Date: 23 Nov, 2005
From: <vnivanch@mail.cern.ch>

On Wed, 23 Nov 2005, Frank Gaede wrote:

> *** Discussion title: Physics List
> Email replies to PublicHyperNews@slac.stanford.edu must include:
>   In-Reply-To: <"/phys-list/191/1/1"@geant4-hn.slac.stanford.edu>
>   Subject: ...change this to be about your reply.
> 
> Hello Vladimir,
> 
> thanks for your reply. However I am not sure this solves the problem. Of
> course I can set the environment variables if the data are installed and
> everything is fine and I get an exception when the data is not there and
> the variables are not set. My point rather is that geant4 runs hapilly
> without complaint in a situation when the environment varibables _are_
> set, but point to a location that doesn't exist or is not readable, i.e.
> the data are not there. The simplest situation is a mere typo in the
> path to the cross section data or - more subtle - a shared disk that
> holds the data is not available for some technical reason in a
> distributed environment like the grid. Both can be taken care of by
> writing a script that excplicitly checks whether cross section data are
> there - however I think it should be the geant4 physics list (process)
> that uses cross section data that should complain/warn if no such data
> is available.
> 
>  Regards, Frank.
> 
> 

Hello Frank,

I do not look into this subject recently, but it was assumed to be like
you suggest - if no access to data files, then exception. If indeed you
observe something opposite in any curcomstances it should be a subject of 
the bug report. 

cheers,
Vladimir

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