We created a new tab at item level for PO Screen (ME21N) for the purpose of STOs (Document Type UB) and created 3 New fields in that new tab through Screen Exit( SAPMM06E, SAPLXM06 0111 ).
When we are entering data in those 3 new fields while creating new STOs, those data are captured in EKPO table.
When we are changing the OLD STOs for those 3 new fields, data is modifying in EKPO table. But changes are NOT inserted in CDHDR and CDPOS table for those 3 new fields.
Answer:
What you need do is to set the flag "Change Document" for the data element of your fields in the "Further Characteristics" tab. Then system will generate the change document for the those fields.
Tcode: SE11
Double click the field under the column Data element to check.
If you want the system to keep the change logs for the table field, you have to ensure that there is a tick beside the Change document field.
