Solution : https://service.sap.com/sap/support/notes/452865 (SAP Service marketplace login required)
Key words : 
type   proposal   optionali_value_pole                                           xin addition, additional optional parameter i_value_pole, optional parameter i_value_pole = 10, optional parameter i_value_pole, parameter i_value_pole restricts, partial stock picks, 5-digit numerators/denominators, terms kzwso reason, attached correction instructions, import parameter   ref
Related Notes : 
       
| 391710 | Rounding of characteristic values for quantity conversion |