How To Fix FL128 - Specify only one update type

SAP Error Message - Details

• Message type: E = Error

• Message class: FL - Function Builder messages

• Message number: 128

• Message text: Specify only one update type

What causes this issue?

You selected both update types, but you may choose only one.

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?

Choose one update type and remove the selection for the other one.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FL128 - Specify only one update type ?

  The SAP error message FL128 ("Specify only one update type") typically occurs in the context of financial or logistics transactions where multiple update types are being specified in a single operation, which is not allowed. This error can arise in various scenarios, such as during the execution of a transaction, report, or batch job that involves updating financial data.
  Cause:
  The error is caused by the user or system attempting to specify more than one update type in a single transaction or operation. In SAP, certain functions or transactions require a single update type to ensure data integrity and consistency. For example, if you are trying to post a document and you inadvertently select multiple update types (like both "Create" and "Change"), the system will throw this error.
  Solution:
  To resolve the FL128 error, follow these steps:
  
  
  Review the Transaction: Check the transaction or report you are executing. Ensure that you are only selecting one update type. This could be "Create," "Change," "Delete," etc.
  
  
  Adjust Input Parameters: If you are using a program or report that allows for multiple parameters, ensure that you are only passing one update type. Look for any selection screens or input fields where you might have inadvertently selected multiple options.
  
  
  Consult Documentation: If you are unsure about the correct update type to use, refer to the SAP documentation or help files related to the specific transaction or report you are using.
  
  
  Check Custom Code: If the error occurs in a custom program or enhancement, review the ABAP code to ensure that it is not trying to set multiple update types simultaneously. You may need to modify the logic to ensure only one update type is specified.
  
  
  Test in a Development Environment: If you have made changes to the input parameters or code, test the transaction in a development or test environment before executing it in production.
  
  
  Related Information:
  
  Transaction Codes: The error can occur in various transaction codes related to financial postings, such as FB01 (Post Document), F-02 (General Posting), or others.
  SAP Notes: Check SAP Notes for any known issues or patches related to the specific transaction or module you are working with.
  User Authorization: Ensure that the user has the necessary authorizations to perform the transaction, as sometimes authorization issues can lead to unexpected errors.
  
  If the problem persists after following these steps, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.