Solution : https://service.sap.com/sap/support/notes/134890 (SAP Service marketplace login required)
Key words : 
currency unit date billling plan, billing plan key figures, user-defined info structures, additional key words tmc6, data object xmcfplt, abap error message, currency unit 38, error message, tables tmc6, currency units 30
Related Notes : 
       
| 204130 | SIS update: Collective note |