Check Customer screen in me23N
I have create a customer screen (Me23N Item -SAPLXM06 - 0111 ) with 1 field obligatory : EKPO-ZZPS_POSID.
The value is save in the table EKPO. But if i'm not going (clik in the customer screen) in the customer screen, he don't verify the field and save the data without take the customer field. how can i do, for he verify the customer screen and if the field is empty, they are an error message in the check box ? ( when we check a popup open and all the error are listed - i don't know how update this popup with my customer field ).
Thank you for your help and your reply.