Thanks - it did not change anything when I added that.
In the AfterUpdate of Text1 I have this
Combo2.RowSource = "SELECT Table1.FIeld1, Table2.Field1, Table2.Field2, Table2.Field2 " & _
"FROM Table2 INNER JOIN Table1 ON Table2.Field4 = Table1.Field4 " & _
"WHERE Table1.Field1...