You want to create an attachment for a purchase requisition item
You are using API_CV_ATTACHMENT_SRV however the attachments are uploaded for all items
SAP S/4 HANA Cloud
You are using the BusinessObjectTypeName BUS2105 , all the items will be updated with the files.
For attachment at Header Level:
In this case BusinessObjectTypeName is BUS2105
For attachment at item level:
In this case BusinessObjectTypeName is EBAN , the purchase requisition number has to be concatinated with the item number, for example 123456780900010 (item number is 10 including 3 leading zeros).
KBA , MM-PUR-REQ-GUI , Userinterface - Purchase Requisitions , Problem