R not finding package even after package installation

Question

I have always worked with the zoo package, that I have installed a long time ago. Today, I created a new R script, and ran library(zoo) and got the following error:

 > library(zoo)
 Error in library(zoo) : there is no package called ‘zoo’

Odd.. Still, I tried reinstalling the package using install.packages("zoo"), and get the following:

 > install.packages("zoo")
 Installing package(s) into ‘C:/Users/U122337.BOSTONADVISORS/Documents/R/win-library/2.15’
 (as ‘lib’ is unspecified)
 --- Please select a CRAN mirror for use in this session ---
 trying URL 'http://cran.cnr.Berkeley.edu/bin/windows/contrib/2.15/zoo_1.7-10.zip'
 Content type 'application/zip' length 874474 bytes (853 Kb)
 opened URL
 downloaded 853 Kb

 package ‘zoo’ successfully unpacked and MD5 sums checked
 Warning: cannot remove prior installation of package ‘zoo’

The downloaded binary packages are in
    C:\Users\U122337.BOSTONADVISORS\AppData\Local\Temp\Rtmp404t8Y\downloaded_packages

When I try uploading the package, I get the error again that the zoo package doesn't exist.

I have no idea what's happening. I exited the GUI and restarted it, same problem. I have always worked with this package, and I have no idea why this is happening now.

Answer 1

Do .libPaths(), close every R runing, check in the first directory, remove the zoo package restart R and install zoo again. Of course you need to have sufficient rights.