Diagnosis
In addition to the system task that is being processed in your currenttransaction, at least one other system task for creation of deliverieswas started in the background.

System Response
The system creates deliveries in the background and records them andany problems that occur in the collective processing log.
This way, you regain control of processing in the delivery listquicker.
If more processes than allowed are necessary, the current foregroundtask is used sequentially.

Procedure
Continue processing the delivery list. Make sure that documents are notaccidentally delivered more than once.

Procedure for System Administration
The number of tasks that can be started in addition to the currenttransaction (creating deliveries in the background) can be set in thedelivery creation profile by using Customizingfor list profiles.
If you enter 0 as an amount, parallel processing is deactivated.