The packet size has been set to 1

Message type: E = Error

Message class: E1 - Messages for IDoc Basis

Message number: 213

Message text: The packet size has been set to 1



What causes this issue?

You have decided on the immediate transfer of IDocs. In this case, the
output is started immediately for every single IDoc which always limits
the packet size to 1 IDoc.

Error message extract from SAP system. Copyright SAP SE.