I am getting below exception
An internal error occurred during: \"Building workspace\".
Java heap space
and then i am getting
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Go to Eclise.ini file(C:\Program Files\eclipse-standard-kepler-SR2-win32-x86_64\eclipse\eclipse.ini) and open it with a Notepad to edit: -Xms256m -Xmx1024m (as per Requirement)
This will increase the heap size and overcomes the error.
PS:for Windows 7 and above,"Run as Administrator" can only Save the Change.