Okey, there is another one possibility to entere data inside the table - SE16N in Expert mode.
1. tr. SE38 -> LSE16NF10 -> "Display" button
2. Search for string CALL FUNCTION 'SE16N_INTERFACE around 916 string. Put a break point in from of this string.
3. Start tr. SE16N -> VTB_DFCU table -> Start transaction.
4. In Debug mode assign values 'X' to variables GD-EDIT and GD-SAPEDIT and press F8 button.
5. Now you are able to enter data into the table. But remember - you have to tabke care of data already in the table. Use Export button to make a bakup. Only then enter your new data.
