PUT
With the following code you can change an existing batch number:
PUT SerialNumber("ItemCode",SysNumber)
PUT SerialNumber(DocumentNumber) // related to OSRN.AbsEntry
The PUT command supports database field names, as well. You can use same (wrong) field names as described in SAP SDK documentation, same field names in SerialNumber object or the current database field names.
Example Beas script
instance bsl b
b.put=SerialNumber("RM_S",10)<tab>{"InternalSerialNumber":"2349494"}
if <b.ret_code> <> 1 then
messagebox=error$$<b.ret_text>
end if