Solution : https://service.sap.com/sap/support/notes/154203 (SAP Service marketplace login required)
Key words : 
purchasing info record     article masterrounding profile              eine-rdprf              marc-rdprfminimum quant, /lot size        eine-minbm              marc-bstmimaximum quant, lot size   eine-bstma marc-bstmarounding, cross-company code stock transfer, additional key words me21, purchasing info record level, purchasing info record, material/article master, attached correction instructions, rounding profile maintained
Related Notes : 
       
| 754129 | FAQ: Purchasing and materials planning | 
| 207351 | Purch order:Invalid roundng accordng to roundng val |