Eclipse: An internal error occurred during "Contacting Software Sites"

Question

I'm using Eclipse Indigo. Every time I opened "Install New Software" I get a pop-up window with

'Contacting Software Sites' has encountered a problem. An internal error occurred during "Contacting Software Sites".

and when I click the details, I get the following message

An internal error occurred during: "Contacting Software Sites". java.lang.NullPointerException

This error prevents me to install any software. Anybody knows the problem ?!

Answer 1

This happened in my eclipse some time ago.

what i did is that i expanaded the error by clicking detail in error popup note down the url that caused it and deleted that in windows->preference->install/update->Available Software Sites