[Rd] R 2.3.0: Use of NULL as an environment is deprecated

Pfaff, Bernhard Dr. Bernhard_Pfaff at fra.invesco.com
Tue Apr 25 17:47:59 CEST 2006

Pfaff, Bernhard Dr. wrote:

> Dear R-Devel subscriber,
> first, let me express my thank to the R-Core team for the new release!
> appreciate their efforts and time spent to enhance R.
> In accordance with the 'NEWS' file (see excerpt of it below), 
> [...
> o	Changed the environment tree to be rooted in an empty
> 	environment, available as emptyenv().  baseenv() has been
> 	modified to return an environment with emptyenv() as parent,
> 	rather than NULL.
> ...
> o	Use of NULL as an environment is deprecated and gives a warning.
> ...]
> I detected the warning message as announced for a couple of
> packages, e.g.
> library(ape)
> library(car)
> library(chron)
> library(urca)

Not so for me. Are you sure you have reinstalled those packages under 

Uwe Ligges

Dear Uwe,

thank you for your hint. That fixes the warnings for packages 'ape',
'car' and 'chron' issued formerly. However, even after a fresh install
the warnings still show up for the packages 'VLMC' and 'urca', as an
Any further clues are most welcome. 


> Now, I am wondering what would be a suitable/elegant way to fix the
> packages' code such that the warning does not appear any longer. I am
> adressing this question to R-devel, because this might also be of
> interest for other package mainatiners.
> Many thanks in advance for any hints and pointers.
> Regards,
> Bernhard
> Dr. Bernhard Pfaff
> Global Structured Products Group
> (Europe)
> Invesco Asset Management Deutschland GmbH
> Bleichstrasse 60-62
> D-60313 Frankfurt am Main
> Tel: +49(0)69 298 07230
> Fax: +49(0)69 298 07178
> Email: bernhard_pfaff at fra.invesco.com 
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