Message SAP XC072 - Unprocessed entries for &1 in channel. Transfer these first

Diagnosis
The transfer of transaction data to system &V1& was stopped by the userand there are still unprocessed entries in the channel.

System Response
The selected models could not be activated.

Procedure
First start the entries that were stopped and then reactivate themodels.
Select Integration model -> Change transfer ->Transaction data in the area menu (transaction CIF).