I am running R 3.2.2 on Windows 8. After installing R packages,
Rterm.exe - System Error.
The program can't start because libatk-1.0-0.dll is missing from your computer.
Try reinstalling the program to fix this problem.
Thank you all for your inputs. I managed to figure it out.
The problem arose as a result of missing GTK+ file. I'm not exactly sure what GTK+ really is, but I know that GTK+ is a preliminary file needed to install the Rattle Package. Here's the step I took to download the GTK+ file.