I am experiencing an extremely peculiar problem, which occurred immediately after converting a self-contained Access 2003 database to a Front/Back End architecture. When I enter a specific field ([SubLocation]) in a Sub-Form and move the Mouse to other Records within the same field context, all values in those fields will consecutively disappear. The integrity of the underlying data is intact and a Data Refresh, Form/Sub-Form Requery, or Refreshing the Table Links does not solve the problem. The Main Form must be closed and opened again for the data to be properly displayed. This problem does not exist within the self-contained version of the database. There is no code in the MouseMove Event of this field. The Enter Event of this field contains code, which modifies the RecordSource of the [SubLocation] field based on the value of the current [Location]. I am at my wits end – can anyone provide some insight into this situation? Thanks