Solution : https://service.sap.com/sap/support/notes/43530 (SAP Service marketplace login required)
Key words :
enter 'r3tr' 'tabu' 't090', customer-specific entries starting, calculation keys starting, 'insert line' icon, 't090r' und 't090v', additional key words, calculation key field, suitable calculation keys, create transfer request, relevant calculation keys
Related Notes :
| 43288 | Additional Info: Upgrading to 3.0E |
| 37387 | Additional Info: Upgrading to 3.0D |