I have ran into a curious error when trying to update Android SDK Tools to revision 21 from revision 20.0.3. The ADT plug-in updated p
Android SDK Tools
revision 21
revision 20.0.3
I got the same problem. Then go to temp folder extract "tools_r24.0.2-windows.zip" copy "tools" folder from extracted folder and then paste it inside "sdk" folder.(or override on tools folder) :)