Solution : https://service.sap.com/sap/support/notes/304537 (SAP Service marketplace login required)
Key words :
object key document management ex_opcode, purchasing document number ex_pur_doc_item, linked sap object ex_object_key, mouse button choose function, purchasing document item ex_pur_text, link purchasing document management, additional key words me21n, ekpo-ebeln mepo1337-ebelp, ekpo-ebelp mepo1337-txz01, type group mmmfd activate
Related Notes :
| 329437 | ME21N: Functions not available |
| 308821 | ME21N Select all: Delete/block not for all items |
| 308153 | Variable for program name too short in CVOB/CV140 |
| 306361 | ME21N: Problems with import data and text elements |
| 304541 | Display of originals does not work in purchasing |
| 202161 | Archiving parameters not transferred |