R devel - Apr 2006 - R 2.3.0: Use of NULL as an environment is deprecated

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)

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 
*****************************************************************
Confidentiality Note: The information contained in this mess...{{dropped}}

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

> 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 
> *****************************************************************
> Confidentiality Note: The information contained in this mess...{{dropped}}
> 
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel

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. 

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 
> *****************************************************************
> Confidentiality Note: The information contained in this
mess...{{dropped}}
> 
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel

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

-- 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 
>>*****************************************************************
>>Confidentiality Note: The information contained in this
> 
> mess...{{dropped}}
> 
>>______________________________________________
>>R-devel at r-project.org mailing list
>>https://stat.ethz.ch/mailman/listinfo/r-devel
> 
>

From: Uwe Ligges
> 
> 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.
The problem could be the mirror site:  Some sites are not as up-to-date as
others.

Andy


 
> 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
>
>>>*****************************************************************
> >>>Confidentiality Note: The information contained in this
> >>
> >>mess...{{dropped}}
> >>
> >>
> >>>______________________________________________
> >>>R-devel at r-project.org mailing list 
> >>>https://stat.ethz.ch/mailman/listinfo/r-devel
> >>
> >>
> > 
> > ______________________________________________
> > R-devel at r-project.org mailing list 
> > https://stat.ethz.ch/mailman/listinfo/r-devel
> 
> ______________________________________________
> R-devel at r-project.org mailing list 
> https://stat.ethz.ch/mailman/listinfo/r-devel
> 
>

Dear Andy, Uwe and remaining list subscribers,

now, coming closer to the evil's root. Yesterday, I source compiled on a
Linux box at home and the result is the same behaviour as pointed out
below. This is regardless of the package version of 'urca'. Aside of
'urca', other packages that have Imports/Depends entries in the
DESCRIPTION to packages that are shipped within the standard library of
R show the warning too, e.g. fMultivar, VLMC, to name but a few.
I do have set on both OS, i.e. Windows and Linux, a second library tree
in Renviron.site with R-LIBS. If I comment this out and do a reinstall
of the packages, i.e. the packages are now installed in the standard
library, the warning does not show up any longer. Has something changed
with regard to additional libraries that slipped my notice by upgrading
to version 2.3.0?

Is it possible that during startup the environment is handeld/passed
differently for standard and additional libraries? Would this odd
behaviour qualify as a bug?



Best,
Bernhard


From: Uwe Ligges
> 
> 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.
The problem could be the mirror site:  Some sites are not as up-to-date
as
others.

Andy


 
> 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
>
>>>*****************************************************************
> >>>Confidentiality Note: The information contained in this
> >>
> >>mess...{{dropped}}
> >>
> >>
> >>>______________________________________________
> >>>R-devel at r-project.org mailing list 
> >>>https://stat.ethz.ch/mailman/listinfo/r-devel
> >>
> >>
> > 
> > ______________________________________________
> > R-devel at r-project.org mailing list 
> > https://stat.ethz.ch/mailman/listinfo/r-devel
> 
> ______________________________________________
> R-devel at r-project.org mailing list 
> https://stat.ethz.ch/mailman/listinfo/r-devel
> 
> 

------------------------------------------------------------------------
------
Notice:  This e-mail message, together with any attachments,...{{dropped}}

>>>>> "BernPf" == Pfaff, Bernhard Dr <Bernhard_Pfaff
at fra.invesco.com>
>>>>>     on Wed, 26 Apr 2006 08:28:34 +0100 writes:
    BernPf> Dear Andy, Uwe and remaining list subscribers,
    BernPf> now, coming closer to the evil's root. Yesterday, I source
compiled on a
    BernPf> Linux box at home and the result is the same behaviour as
pointed out
    BernPf> below. This is regardless of the package version of
'urca'.
Aside of
    BernPf> 'urca', other packages that have Imports/Depends entries
in
the
    BernPf> DESCRIPTION to packages that are shipped within the standard
library of
    BernPf> R show the warning too, e.g. fMultivar, VLMC, to name but a
few.
    BernPf> I do have set on both OS, i.e. Windows and Linux, a second
library tree
    BernPf> in Renviron.site with R-LIBS. If I comment this out and do a
reinstall
    BernPf> of the packages, i.e. the packages are now installed in the
standard
    BernPf> library, the warning does not show up any longer. Has
something changed
    BernPf> with regard to additional libraries that slipped my notice
by upgrading
    BernPf> to version 2.3.0?

I don't think so.
I ***NEVER*** install a package into the standard library.
We have all CRAN packages in a different library, 
(and Bioconductor too) and I typically use about 6 library (paths),
and I don't have your problem.

I only get your warning if I get a version of a package that was
installed previous to 2.3.0 (or it's alpha / beta / rc ) versions.

    BernPf> Is it possible that during startup the environment is
handeld/passed
    BernPf> differently for standard and additional libraries? Would
this odd
    BernPf> behaviour qualify as a bug?

If it was general, yes, but I think it's not.


Hello Martin and all others involved in this thread,

thank you very much for your time and patience. After having updated the
packages in the standard library, too, the warning message does indeed
not show up any longer by issuing the command library(urca) and similar
with other packages. Just out of curiosity, I wonder what has changed in
these packages (i.e. nlme, foreign, cluster and VR got updated) from
downloading the '.exe' or the tarball in the official 2.3.0 release up
to now?

Best,
Bernhard
*****************************************************************
Confidentiality Note: The information contained in this mess...{{dropped}}

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)
> 
> 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.
If you are a maintainer of a package getting this warning, then you 
should replace all uses of NULL as an environment by baseenv() (to get 
the previous behaviour), or emptyenv() (if you thought env=NULL gave you 
an empty environment).

There's really not much a non-maintainer can do about this warning.

Duncan Murdoch
> 
> 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 
> *****************************************************************
> Confidentiality Note: The information contained in this mess...{{dropped}}
> 
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