How To Fix SAP_VF023 - Mandatory parameter & must be passed exactly once

SAP Error Message - Details

• Message type: E = Error

• Message class: SAP_VF - SAP_VF

• Message number: 023

• Message text: Mandatory parameter & must be passed exactly once

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SAP_VF023 - Mandatory parameter & must be passed exactly once ?

  The SAP error message SAP_VF023 indicates that a mandatory parameter is required but has not been passed correctly in the context of a transaction or function module. This error typically occurs in the context of billing documents or invoice processing in SAP.
  Cause:
  The error arises when a required parameter is either missing or is passed multiple times in a function call or transaction. This can happen due to:
  
  Incorrect Function Module Call: If a function module is called without providing all the necessary parameters or if a parameter is provided more than once.
  Configuration Issues: Sometimes, the configuration settings in the billing or invoicing process may not be set up correctly, leading to missing parameters.
  Custom Code: If there are custom developments or enhancements in the system, they might not be handling the parameters correctly.
  
  Solution:
  To resolve the SAP_VF023 error, you can take the following steps:
  
  
  Check Function Module/Transaction: Review the function module or transaction that triggered the error. Ensure that all mandatory parameters are being passed correctly and only once.
  
  
  Review Documentation: Look at the SAP documentation for the specific function module or transaction to understand the required parameters and their expected values.
  
  
  Debugging: If you have access to the ABAP debugger, you can set breakpoints in the relevant code to see what parameters are being passed and identify any discrepancies.
  
  
  Check Custom Code: If there are any custom enhancements or modifications, review the code to ensure that it adheres to the expected parameter requirements.
  
  
  Consult SAP Notes: Search for relevant SAP Notes that might address this specific error. SAP frequently updates its knowledge base with solutions for common issues.
  
  
  Contact SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP support for assistance.
  
  
  Related Information:
  
  Transaction Codes: This error may occur in transactions related to billing, such as VF01 (Create Billing Document), VF02 (Change Billing Document), or VF03 (Display Billing Document).
  Function Modules: If you are working with specific function modules related to billing, such as BAPI_BILLINGDOC_CREATE, ensure that you are familiar with the required parameters.
  SAP Community: The SAP Community forums can be a valuable resource for finding similar issues and solutions shared by other users.
  
  By following these steps, you should be able to identify and resolve the cause of the SAP_VF023 error.