Hi fellows, I am working on a material management system. There is a table which only includes material codes and descriptions as a primary key and there is another table for data entries connected to the material list table with one-to-many relation ship. On data entry table users are importing packing lists from excel with transferspreadsheet macro. If material is not in the packing list user suppose to add this material to the mat. list table. But its very likely to miss those items which are in the packing list and are not in the mat list table.In such a case access will import packing list without these items. Therefore I would like to put a control mechanism which gives a warning to the user if there is additional material which was not defined in the mat. list before so user can add it.