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.

Smart SAP Assistant

• What is the cause and solution for SAP error message VN378 - Mail title for application &, output type &, language & not found ?

  Certainly! Here's a detailed explanation for the SAP error message VN378: "Mail title for application &, output type &, language & not found":
  
  Error Message:
  VN378
  
  Mail title for application &, output type &, language & not found
  
  Cause:
  This error occurs when SAP tries to send an output (such as a purchase order, invoice, or other document) via email, but it cannot find the corresponding mail title (subject line) for the specified combination of:
  
  Application (e.g., purchasing, billing)
  Output type (e.g., NEU for purchase order)
  Language
  
  The mail title is a predefined subject line used in the email sent to the recipient. If this title is missing or not maintained for the given combination, SAP cannot generate the email subject, resulting in this error.
  
  Where is this maintained?
  The mail title is maintained in the customizing for output management, specifically in the message control or output determination settings.
  
  Solution:
  
  
  Check the mail title configuration:
  
  
  Go to transaction SPRO ?
  
  Materials Management ? Purchasing ? Messages ? Output Control ? Define Mail Titles
  
  (The exact path may vary depending on the module and SAP version.)
  
  
  Alternatively, use transaction NACE (for older output determination) or BRF+ / Output Management in newer SAP versions.
  
  
  
  
  Maintain the mail title:
  
  Find the entry for the relevant Application, Output Type, and Language.
  If it does not exist, create a new entry.
  Enter an appropriate mail title (subject line) that will be used in the email.
  
  
  
  Save and test:
  
  After maintaining the mail title, try to resend the output.
  The error should no longer occur if the mail title is correctly maintained.
  
  
  
  
  Additional Information:
  
  This error is common when new output types are created or when new languages are introduced but the mail titles are not maintained accordingly.
  The mail title is important for the recipient to understand the context of the email.
  In some cases, the mail title can contain variables/placeholders that are replaced dynamically during output processing.
  If you are using SAP S/4HANA or newer output management frameworks, the mail title might be maintained in BRF+ or via the Output Management app.
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Error
  VN378: Mail title for application &, output type &, language & not found
  
  
  Cause
  Missing mail title for the specified application, output type, and language combination
  
  
  Solution
  Maintain the mail title in customizing (SPRO) or via transaction NACE/BRF+ for the relevant combination
  
  
  Related Transactions
  SPRO, NACE, BRF+, Output Management configuration
  
  
  
  
  If you need help with the exact customizing path or transaction depending on your SAP version, please provide your SAP system version and module context.