Solution : https://service.sap.com/sap/support/notes/216734 (SAP Service marketplace login required)
Key words :
additional key words r3up, objects limu adir r3trfugxx, tadir entry 'r3tr fugx, upgrade missing customer enhancements, entry r3tr fugx, fields pgmid = r3tr, field program = saplx, abap main program, searched tadir entry, displayed screens belong
Related Notes :
| 308196 | Field exit cannot be found after upgrade to Rel. 4.x |
| 123770 | Loss of data after the R/3 upgrade |