The Android Virtual Device is currently running in an emulator and cannot be deleted

I want to delete a AVD(Android Virtual Device), but it cannot be deleted with the error message "The Android Virtual Device XXX is currently running in an emulator and cannot be deleted". In fact that it is not running.

To delete the AVD manually (in Linux):

• Switch to /.android/avd folder in your HOME directory.
• Delete the corresponding .avd folder and .ini file.
• Delete it in Eclipse.