limonov:
One thing you can try is to select the problematic library part and go to File > Libraries & Objects > Open Object... This will open the library part, now Save, this will update the library part to the ArchiCAD version you are running. This may solve the problem, you should keep a copy of these parts unaltered just in case.
You should tell us which library parts are giving this message (are they part of the ArchiCAD Library that came with the application, parts you wrote, 3rd party parts?). Also:
You should add a Signature to your Profile (click the Profile button near the top of this page) with your ArchiCAD version and operating system (see mine for an example) for more accurate help in this forum.
David
