Eclipse Upgrade Not Working

Question

My Eclipse out of the blue stopped building my Android so I removed the old version and have installed Indigo. When I try to import an Android project in I get this error:<

Answer 1

Upgrades did not work for me (on Linux), so I just installed IntelliJ Idea (build 123.155). Had to modify idea.sh to set JDK_HOME=/usr/lib/jvm/jdk1.7.0 (the Oracle JDK) and to select [menu] -- Run -- Run... -- Edit Configurations... -- Target Device -- USB device to make it work with the real device.