R 2.3.0: Use of NULL as an environment is deprecated

Pfaff, Bernhard Dr. wrote:

Pfaff, Bernhard Dr. wrote:

Pfaff, Bernhard Dr. wrote:

Dear R-Devel subscriber,

first, let me express my thank to the R-Core team for the new 
release!

I

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

contributed

packages, e.g.

library(ape)
library(car)
library(chron)
library(urca)

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

packages under

R-2.3.0?

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 

example. Any further clues are most welcome.

OS? R release?

and please report the result of

   packageDescription("urca")
   packageDescription("VLMC")

Uwe Ligges


Hello Uwe,

here is the detailed information:

R.version

               _                         
platform       i386-pc-mingw32           
arch           i386                      
os             mingw32                   
system         i386, mingw32             
status                                   
major          2                         
minor          3.0                       
year           2006                      
month          04                        
day            24                        
svn rev        37909                     
language       R                         
version.string Version 2.3.0 (2006-04-24)


Package: urca
Version: 0.9-2

              ^^^

Date: 2006-02-25
Title: Unit root and cointegration tests for time series data
Author: Bernhard Pfaff <bernhard.pfaff at pfaffikus.de>
Maintainer: Bernhard Pfaff <bernhard at pfaffikus.de>
Depends: R (>= 2.0.0)
Imports: nlme, methods, graphics, stats
LazyLoad: yes
Description: Unit root and cointegration tests encountered 

in applied

        econometric analysis are implemented.
License: GPL version 2 or newer
URL: http://www.r-project.org
Packaged: Sat Feb 25 19:34:29 2006; bp
Built: R 2.3.0; ; 2006-03-03 21:12:31; windows

                          ^^^^^

Well, 0.9-3 is on CRAN, so you have *not* upgraded your *own* 
package!!!

Please upgrade ALL your packages and re-install also ALL 
those that are 
from prior R releases.

Uwe Ligges

-- File: C:/R/package/urca/DESCRIPTION

packageDescription("VLMC")

Package: VLMC
Version: 1.3-9
Note: ===== vlmc.version in R/vlmc.R
Date: 2005-10-06
Author: Martin Maechler <maechler at stat.math.ethz.ch>
Maintainer: Martin Maechler <maechler at stat.math.ethz.ch>
Title: VLMC -- Variable Length Markov Chains
Description: Functions, Classes & Methods for estimation, 

prediction,

        and simulation (bootstrap) of VLMC -- Variable Length Markov
        Chain -- Models
Depends: stats, MASS
License: GPL version 2 or later
Packaged: Thu Oct 6 15:00:09 2005; maechler
Built: R 2.3.0; i386-pc-mingw32; 2006-03-03 19:04:48; windows

-- File: C:/R/package/VLMC/DESCRIPTION

Both packages have Depends/Imports directives in their DESCRIPTION 
files. Now, I do get the following for VLMC if I do a 

'library(MASS)'

first:

library(MASS)

Warning message:
Verwendung der NULL Umgebung ist veraltet

library(VLMC)

and likewise for urca:

library(nlme)

Warning message:
Verwendung der NULL Umgebung ist veraltet

library(urca)

Best,
Bernhard

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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