Message type: E = Error
Message class:  VN - Nachrichtensteuerung 
Message number: 377
Message text: Mail text for application &, output type &, language & not found
The language was changed. Therefore the system tried to read the text
for the specified combination of application/output type/language.
The system could not find this text.
The TEMPLATE object (condition record maintenance) or the MESSAGE
object (output processing) has not changed. This means that it is not
filled with new text.
Reset the language or output type.
Select a language or an output type for which a text has been
maintained.
Maintain the required mail text in Customizing for output control.
Error message extract from SAP system. Copyright SAP SE.
Certainly! Here's a detailed explanation for the SAP error message VN377: "Mail text for application &, output type &, language & not found": Error Message VN377: Mail text for application &, output type &, language & not found Cause This error occurs when SAP tries to send an email (usually as part of output processing, e.g., for purchase orders, invoices, or other documents) but cannot find the corresponding mail text in the system for the specified: Application (e.g., purchasing, billing) Output type (e.g., NEU for purchase order output) Language (the language in which the mail text should be sent) The mail text is a predefined text template used to generate the body of the email. If this text is missing or not maintained for the combination of application, output type, and language, SAP cannot generate the email content, resulting in this error. Where is this mail text maintained? Mail texts are maintained in transaction SO10 (Standard Texts) or via the
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
VN376 Mail partner not found or empty! Object was created without partner!
What causes this issue?  The specified partner is not a valid mail partner or you entered an empty partner.System Response  The system creates a MESSA...
VN375 There is no text for the mail output
What causes this issue?  No text has been stored for the processed mail output.System Response  The system issues an error message and will not allow ...
VN378 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 sp...
VN379 Text for mail with new language & has been changed
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.