# R – Error in installation a R package

installationpackager

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

I tried to install MASS package from local:

``````> utils:::menuInstallLocal()
package ‘MASS’ successfully unpacked and MD5 sums checked
Warning: cannot remove prior installation of package ‘MASS’
``````

Even I cannot remove "MASS":

``````> remove.packages("MASS")
Removing package from ‘C:/Program Files/R/R-3.0.1/library’
(as ‘lib’ is unspecified)
Error in find.package(pkgs, lib) : there is no package called ‘MASS’
``````

Also with this option I couldn't install package:

``````> options(install.lock=T)
package ‘MASS’ successfully unpacked and MD5 sums checked
Warning: cannot remove prior installation of package ‘MASS’
Warning: restored ‘MASS’
Warning message:
In file.copy(savedcopy, lib, recursive = TRUE) :
problem copying C:\Program Files\R\R-3.0.1\library\00LOCK\MASS\libs\x64\MASS.dll to C:\Program Files\R\R-3.0.1\library\MASS\libs\x64\MASS.dll: Permission
``````

And with install.packages:

``````> install.packages("C:\\MASS_7.3-35.zip",repos=NULL)
package ‘MASS’ successfully unpacked and MD5 sums checked
Warning: cannot remove prior installation of package ‘MASS’
Warning: restored ‘MASS’
Warning message:
In file.copy(savedcopy, lib, recursive = TRUE) :
problem copying C:\Program Files\R\R-3.0.1\library\00LOCK\MASS\libs\x64\MASS.dll to C:\Program Files\R\R-3.0.1\library\MASS\libs\x64\MASS.dll: Permission
``````

I should mention I use R with ORE (Oracle R Enterprise).

There could be a few things happening here. Start by first figuring out your library location:

``````Sys.getenv("R_LIBS_USER")
``````

or

``````.libPaths()
``````

We already know yours from the info you gave: C:\Program Files\R\R-3.0.1\library

I believe you have a file in there called: `00LOCK`. From `?install.packages`:

Note that it is possible for the package installation to fail so badly that the lock directory is not removed: this inhibits any further installs to the library directory (or for --pkglock, of the package) until the lock directory is removed manually.

You need to delete that file. If you had the `pacman` package installed you could have simply used `p_unlock()` and the `00LOCK` file is removed. You can't install `pacman` now until the `00LOCK` file is removed.

To install `pacman` use:

``````install.packages("pacman")
``````

There may be a second issue. This is where you somehow corrupted `MASS`. This can occur, in my experience, if you try to update a package while it is in use in another R session. I'm sure there's other ways to cause this as well. To solve this problem try:

1. Close out of all R sessions (use task manager to ensure you're truly R session free) Ctrl + Alt + Delete
2. Go to your library location `Sys.getenv("R_LIBS_USER")`. In your case this is: C:\Program Files\R\R-3.0.1\library
3. Manually delete the `MASS` package
4. Fire up a vanilla session of R
5. Install `MASS` via `install.packages("MASS")`

If any of this works please let me know what worked.