Solution : https://service.sap.com/sap/support/notes/751659 (SAP Service marketplace login required)
Key words :
data transfer -> change transfer -> change transfer, transaction data -> activate online transfer, sap components -> advanced planning, symptom apo resource button, reference data change, additional capacity data, apo resource button, user interface -> activate, optimization -> basic settings, user interface -> save
Related Notes :
| 1168596 | Incorrect resource type transfered from R/3 to APO |
| 674838 | Resource transfer from APO Release 4.0 |