I have added two fields to sale order item table control in program SAPMV45A screen no . 4900. Now the field which i have added are working fine while creating sale order but while changing those fields are not changing.
condition is like this: the custom field are automatically filled by some logic and if the user want to change those field he will able to do. Now 1st condition is fine and when i change those field they will show the previous saved value inspite of changed value.
I have also added those field in additional data b tab in screen 8459 , there they are working fine but here the problem remains the same.
u can use BAPI_SALESORDER_CHANGE to update the values of those fields. for that u need to extend few tables and coding that u can get from the BAPI documentation. If not getting reply back. i can help u..