[R] use of NULL environment is deprecated?

Sundar Dorai-Raj sundar.dorai-raj at pdf.com
Wed Jul 12 00:43:01 CEST 2006

Patrick Connolly wrote:
> ]> version
>                _                         
> platform       x86_64-unknown-linux-gnu  
> arch           x86_64                    
> os             linux-gnu                 
> system         x86_64, linux-gnu         
> status                                   
> major          2                         
> minor          3.1                       
> year           2006                      
> month          06                        
> day            01                        
> svn rev        38247                     
> language       R                         
> version.string Version 2.3.1 (2006-06-01)
> I see in the NEWS file the line:
>     o	Use of NULL as an environment is deprecated and gives a warning.
> Which duly happens.  I get warnings like this:
>>Warning message:
> use of NULL environment is deprecated
> My problem is that I don't know what is being referred to.  A little
> birdie tells me that in later versions of R, those warnings will
> become errors so I need to work out where they're coming from before I
> can use later versions.
> My question is: How does one work out which is being referred to by
> such a message?  The traceback() function is useful when failure
> occurs.  Is there an analagous way of looking into warnings?

Hi, Patrick,

This will happen when you load a package that was created for an earlier 
version of R. If this is your own package, recreate the package using 
R-2.3.1. If it's a package on CRAN, then update.packages() should also 
do the trick.



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