I am trying to install the ADT Plugin. I go to Help install new software in eclipse and then after selecting the development tool I get this error
Cannot com
I was using eclipse (helios version 3.6.2) and tried to install android SDK but i failed with abovee mentioned error.
I found the solution for this issue.
Select the "Available software sites" list
http://download.eclipse.org/releases/helios/201102250900 (Helios) and http://download.eclipse.org/releases/helios (Helios Milestone Repository)
If using galileo select the appropriate release line from avail sw site list. 'Check for Updates' (to get the Helios updates), then install the plugin.
i had the same problem. I solved it by open the eclipse in the console with: sudo eclipse