Solution : https://service.sap.com/sap/support/notes/49678 (SAP Service marketplace login required)
Key words :
enter string 123f ekko 6, symptom maintaining text types, enter r3tr tabu, additional key words, program id/object, source document category, standard view maintenance, manual transport connection, individual key fields, key fields
Related Notes :
| 448814 | FAQ: Texts in purchasing |