Error in loadNamespace, object 'vI' not found with package plm
<p>I never had problems with installing packages before. 
When I first tried to install the <code>plm</code> package, it gave me an error saying that package <code>pbkrtest</code> was not installed. So I tried installing <code>pbkrtest</code>, but <code>install.packages("pbkrtest")</code> did not work, it gave me this error message: </p>

<blockquote>
  <p>install.packages("pbkrtest")
    Installing package into ‘C:/Users/Flo/Documents/R/win-library/3.2’
    (as ‘lib’ is unspecified)
    Warning in install.packages :
      package ‘pbkrtest’ is not available (for R version 3.2.2)</p>
</blockquote>

<p>I downloaded it manually from <a href="https://cran.r-project.org/src/contrib/Archive/pbkrtest/" rel="nofollow">https://cran.r-project.org/src/contrib/Archive/pbkrtest/</a> and put it into the respective directory. </p>

<p>Moving on, I could now install plm. Nevertheless, I am now stuck with this error and cannot use the plm package: </p>

<pre><code>library(plm)
</code></pre>

<blockquote>
  <p>Error in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]]) : 
      object 'vI' not found<br>
    In addition: Warning message:<br>
  package ‘plm’ was built under R version 3.2.3<br>
    Error: package or namespace load failed for ‘plm’</p>
</blockquote>

<p>Here is my session info: </p>

<pre><code>R version 3.2.2 (2015-08-14)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 8 x64 (build 9200)

locale:
[1] LC_COLLATE=German_Germany.1252  LC_CTYPE=German_Germany.1252    LC_MONETARY=German_Germany.1252
[4] LC_NUMERIC=C                    LC_TIME=German_Germany.1252    

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] dplyr_0.4.3    ggplot2_2.1.0  magrittr_1.5   stargazer_5.2  foreign_0.8-65 Formula_1.2-1 

loaded via a namespace (and not attached):
 [1] Rcpp_0.12.3      knitr_1.12.3     MASS_7.3-43      munsell_0.4.3    colorspace_1.2-6
 [6] lattice_0.20-33  R6_2.1.2         plyr_1.8.3       tools_3.2.2      parallel_3.2.2  
[11] nnet_7.3-10      grid_3.2.2       nlme_3.1-125     gtable_0.2.0     DBI_0.3.1       
[16] lmtest_0.9-34    assertthat_0.1   bdsmatrix_1.3-2  sandwich_2.3-4   scales_0.4.0    
[21] zoo_1.7-12 
</code></pre>