[R] Can't resolve dependency problems with package "sem"

[C&A Säger]

Hello,

First time user on Ubuntu 14.4 with Ubuntus R Commander and

> $ R --version
> R version 3.0.2 (2013-09-25) -- "Frisbee Sailing"
> Copyright (C) 2013 The R Foundation for Statistical Computing
> Platform: x86_64-pc-linux-gnu (64-bit)

The program icon of the commander executes

> sh -c 'R_DEFAULT_PACKAGES="$R_DEFAULT_PACKAGES Rcmdr" R "$@"'

On first run it started downloading, compiling and installing various
packages. One of them fails:

> 
>> install.packages("sem",dependencies=TRUE)
> Installing package into ‘/home/andreas/R/x86_64-pc-linux-gnu-library/3.0’
> (as ‘lib’ is unspecified)
> Warnung: dependencies ‘MBESS’, ‘arm’, ‘plyr’ are not available
> also installing the dependencies ‘scales’, ‘mi’, ‘DiagrammeR’
> 
> versuche URL 'http://ftp5.gwdg.de/pub/misc/cran/src/contrib/scales_0.4.0.tar.gz'
> Content type 'application/x-gzip' length 57358 bytes (56 Kb)
> URL geöffnet
> ==================================================
> downloaded 56 Kb
> 
> versuche URL 'http://ftp5.gwdg.de/pub/misc/cran/src/contrib/mi_1.0.tar.gz'
> Content type 'application/x-gzip' length 793313 bytes (774 Kb)
> URL geöffnet
> ==================================================
> downloaded 774 Kb
> 
> versuche URL 'http://ftp5.gwdg.de/pub/misc/cran/src/contrib/DiagrammeR_0.8.2.tar.gz'
> Content type 'application/x-gzip' length 3532835 bytes (3.4 Mb)
> URL geöffnet
> ==================================================
> downloaded 3.4 Mb
> 
> versuche URL 'http://ftp5.gwdg.de/pub/misc/cran/src/contrib/sem_3.1-7.tar.gz'
> Content type 'application/x-gzip' length 154654 bytes (151 Kb)
> URL geöffnet
> ==================================================
> downloaded 151 Kb
> 
> ERROR: dependency ‘plyr’ is not available for package ‘scales’
> * removing ‘/home/andreas/R/x86_64-pc-linux-gnu-library/3.0/scales’
> ERROR: dependency ‘arm’ is not available for package ‘mi’
> * removing ‘/home/andreas/R/x86_64-pc-linux-gnu-library/3.0/mi’
> ERROR: dependency ‘scales’ is not available for package ‘DiagrammeR’
> * removing ‘/home/andreas/R/x86_64-pc-linux-gnu-library/3.0/DiagrammeR’
> ERROR: dependency ‘mi’ is not available for package ‘sem’
> * removing ‘/home/andreas/R/x86_64-pc-linux-gnu-library/3.0/sem’
> 
> Die heruntergeladenen Quellpakete sind in
> ‘/tmp/RtmplEqHDo/downloaded_packages’
> Warnmeldungen:
> 1: In install.packages("sem", dependencies = TRUE) :
> Installation des Pakets ‘scales’ hatte Exit-Status ungleich 0
> 2: In install.packages("sem", dependencies = TRUE) :
> Installation des Pakets ‘mi’ hatte Exit-Status ungleich 0
> 3: In install.packages("sem", dependencies = TRUE) :
> Installation des Pakets ‘DiagrammeR’ hatte Exit-Status ungleich 0
> 4: In install.packages("sem", dependencies = TRUE) :
> Installation des Pakets ‘sem’ hatte Exit-Status ungleich 0

How can I resolve the dependencies?
Should I replace the Ubuntu version with something fresh?

Thanks in advance,
Andreas