I had some reports, that very old Swisslog DBs did not migrate correctly to Version 5. The migration worked without problems on my system. Therefore I assume, that the reason for the problem is an very old jet Engine. If you encounter such a Problem please update to the newest Jet engine.
Here are the links to the update Instructions:
English: How to obtain the latest service pack for the Microsoft Jet 4.0 Database Engine
German: So erhalten Sie das aktuelle Service Pack für die Microsoft Jet 4.0-Datenbank-Engine