How To Fix MN279 - Function & not defined

SAP Error Message - Details

• Message type: E = Error

• Message class: MN - Message class for subsequent settlement (Purchasing)

• Message number: 279

• Message text: Function & not defined

What causes this issue?

If you did not invoke function &V1& via manual input, it is likely that
a program error has occurred.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

If necessary, contact your system administrator.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MN279 - Function & not defined ?

  The SAP error message MN279 ("Function & not defined") typically occurs when the system is unable to find a specific function or routine that is expected to be available in the context of the operation being performed. This can happen for various reasons, including configuration issues, missing function modules, or incorrect program logic.
  Causes:
  
  Missing Function Module: The function module that is being called does not exist in the system.
  Incorrect Function Name: There may be a typo or incorrect naming in the function call.
  Authorization Issues: The user may not have the necessary authorizations to access the function.
  Transport Issues: If the function was recently transported from another system, it may not have been properly imported.
  Custom Development: If the function is part of a custom development, it may not have been activated or may have errors.
  
  Solutions:
  
  Check Function Module: Verify that the function module exists in the system. You can do this by using transaction code SE37 (Function Builder) to search for the function.
  Correct Naming: Ensure that the function name is spelled correctly in the code where it is being called.
  Authorization Check: Make sure that the user has the necessary authorizations to execute the function. This can be checked in transaction SU53 after the error occurs.
  Transport Check: If the function was recently transported, check the transport logs to ensure that it was imported successfully without errors.
  Debugging: If you have access to the ABAP code, you can debug the program to see where the function is being called and what parameters are being passed.
  Consult Documentation: If the function is part of a standard SAP module, consult the SAP documentation or support notes for any known issues or updates.
  
  Related Information:
  
  Transaction Codes: 
  
  SE37: Function Module Builder
  SE80: Object Navigator
  SE11: Data Dictionary
  SU53: Authorization Check
  
  
  SAP Notes: Check the SAP Support Portal for any relevant notes that might address this specific error.
  Community Forums: SAP Community and other forums can be helpful for finding similar issues and solutions shared by other users.
  
  If the issue persists after trying the above solutions, it may be necessary to involve your SAP Basis or development team for further investigation.