How To Fix V4128 - Enter the serial number

SAP Error Message - Details

• Message type: E = Error

• Message class: V4 - Nachrichten Verkauf (Variable Meldungen und EDI-Meldungen)

• Message number: 128

• Message text: Enter the serial number

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message V4128 - Enter the serial number ?

  The SAP error message V4128, which states "Enter the serial number," typically occurs in the context of handling materials that are serialized in the SAP system. This error indicates that the system requires a serial number to be entered for a specific item, but it has not been provided.
  Cause:
  
  Missing Serial Number: The most common cause of this error is that the user has not entered a serial number for a material that requires one.
  Configuration Issues: The material may be configured in such a way that it mandates a serial number for transactions (e.g., sales orders, deliveries, or inventory management).
  Transaction Type: The specific transaction being performed may require a serial number, and the system is enforcing this requirement.
  
  Solution:
  
  Enter Serial Number: The simplest solution is to ensure that you enter a valid serial number for the item in question. This can usually be done in the relevant field of the transaction screen.
  Check Material Master Data: Verify the material master data to ensure that the serial number management is correctly configured. You can check this in the material master under the "Sales" or "Inventory Management" views.
  Review Transaction Settings: If you are consistently encountering this error for certain transactions, review the transaction settings to ensure that they align with your business processes.
  User Training: Ensure that users are trained on the importance of entering serial numbers for serialized materials and understand how to do so in the system.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on handling serialized materials in your version of SAP.
  
  Related Information:
  
  Serial Number Management: In SAP, serial number management is often used for high-value items or items that require tracking for warranty or service purposes.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as:
  
  MM01: Create Material
  MM02: Change Material
  VL01N: Create Outbound Delivery
  VA01: Create Sales Order
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to serial number management that may be relevant to your version of SAP.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP support team or a technical consultant for further assistance.