Apart from the integrator specific project defaults that are also relevant when using the OSCI interface, the setting of project default ZI_OSCI_CO is very important.
This project default determines the level at which commits are performed during the OSCI import.
If you set this project default to RECORD, a commit is done after each record that is processed successfully.
If the project default is set to COMPANY, a commit is done after each company/supplier after all its details have been processed successfully.
You can open the A.60.63 Valid Settings screen via the toolbar on the OSCI 10.01 screen to see the full and actual list of settings needed for OSCI.
For more information about project defaults, see Project Defaults.