An error has occurred during transmission of an automatic message

What causes this issue?

An error has occurred during transmission of an automatic message.
For more information on searching for errors, see the determination
analysis in message determination.

How to fix this error?

Choose <LS>Goto -> Message -> Header</> or <LS>Item</>.
The list displaying the status of messages appears.
Select the line required and choose <LS>Goto -> Determ. analysis</>.
The system displays information on how to correct the error.
If you cannot correct the error:
INCLUDE NA_SYSADMIN1

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.