Solution : https://service.sap.com/sap/support/notes/584997 (SAP Service marketplace login required)
Key words :
general settings -> check units, includes 2 decimal places, underlying data elements, require higher values, service price reason, error message se 370, error message 00 089, gross price, terms se 370, item level
Related Notes :
| 635511 | FAQ: Purchase requisitions in the service |
| 634395 | FAQ: Purchase orders in the service |
| 426058 | Purchase order qty on item level for SRV always "1" |