It looks as if for some reason the .lpr of your project omits the Interfaces unit.
The Lazarus team is glad to announce the release of Lazarus 1.6.2. This is a bugfix release.This release was built with FPC 3.0.0.The previous release Lazarus 1.6.0 was built with FPC 3.0.0 too.Here is the list of changes for Lazarus and Free Pascal:http://wiki.lazarus.freepascal.org/Lazarus_1.6.0_release_noteshttp://wiki.lazarus.freepascal.org/User_Changes_3.0.0
Also if 1.6.0 and 1.6.2 are both built with FPC3.0.0, how is it this is shown to have changes ?
but if this is 1.6.2, why are the release notes for 1.6.0 ?