How To Fix VN378 - Mail title for application &, output type &, language & not found

SAP Error Message - Details

• Message type: E = Error

• Message class: VN - Nachrichtensteuerung

• Message number: 378

• Message text: Mail title for application &, output type &, language & not found

What causes this issue?

The language or the output type of the mail output was changed.
Therefore, the system tried to read the mail title for the specified
combination of application/output type/language.
The system could not find this title.

System Response

The TEMPLATE object (condition record maintenance) or MESSAGE object
(output processing) has not changed. This means that the object is not
filled with the new mail title.

How to fix this error?

Reset the language or output type.
Select a language or an output type for which a mail title has been
maintained.
Maintain the required mail title in Customizing for output control.

Error message extract from SAP system. Copyright SAP SE.