R error installing package on start [duplicate]

Question

When I start R on my windows machine, I get below log. Why do i get 2 errors below? how could I debug them? Is the problem associated with packages Arules and Matrix? Why do I get this error only for these 2 packages? I also installed rest of the packages in the same location...

What does it mean when it says " The following objects are masked from ‘package:base’: "?

R version 3.1.0 (2014-04-10) -- "Spring Dance"
Copyright (C) 2014 The R Foundation for Statistical Computing
Platform: x86_64-w64-mingw32/x64 (64-bit)


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[Workspace loaded from ~/.RData]

**Error installing package: 'C:\Program' is not recognized as an internal or external command,
operable program or batch file.

Error installing package: 'C:\Program' is not recognized as an internal or external command,
operable program or batch file.**

Loading required package: arules
Loading required package: Matrix

Attaching package: ‘arules’

The following objects are masked from ‘package:base’:

    %in%, write

Answer 1

This may be related to a space in the install location of R, which is not recommended see:

Error installing R Packages