How To Fix MSG_CL_ER166 - Invalid update: &1 &2 &3 may not be changed

SAP Error Message - Details

• Message type: E = Error

• Message class: MSG_CL_ER - Message Class for Enterprise Registry

• Message number: 166

• Message text: Invalid update: &1 &2 &3 may not be changed

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 MSG_CL_ER166 - Invalid update: &1 &2 &3 may not be changed ?

  The SAP error message MSG_CL_ER166 with the description "Invalid update: &1 &2 &3 may not be changed" typically occurs in the context of updating certain data records in the SAP system. This error indicates that the system has detected an attempt to change a field or record that is not allowed to be modified due to business rules or system constraints.
  Cause:
  
  Business Logic Restrictions: The field or record you are trying to update may be governed by specific business rules that prevent changes after certain conditions are met (e.g., after a document is posted or approved).
  Data Locking: The record may be locked by another user or process, preventing any changes.
  Configuration Settings: Certain fields may be configured in such a way that they are set to be non-editable in specific scenarios.
  Status of the Document: The document or record may be in a status that does not allow changes (e.g., completed, archived, etc.).
  
  Solution:
  
  Check Document Status: Verify the status of the document or record you are trying to change. If it is in a completed or locked status, you may need to take appropriate actions to unlock or revert the status.
  Review Business Rules: Consult with your business process owner or SAP functional consultant to understand the business rules that apply to the data you are trying to modify.
  Data Locking: Ensure that no other users or processes are currently editing the same record. You can check for locks using transaction codes like SM12 (for lock entries).
  Configuration Review: If you have access, review the configuration settings related to the specific transaction or module to see if there are restrictions on the fields you are trying to update.
  Use Correct Transaction: Ensure you are using the correct transaction code for the operation you are trying to perform. Some transactions may have specific limitations on what can be changed.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11 (Data Dictionary), SE80 (Object Navigator), and SM12 (Lock Entries) to investigate further.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide additional context.
  Documentation: Review the documentation for the specific module you are working with (e.g., MM, SD, FI) to understand the rules and constraints that apply to data updates.
  
  If the issue persists after following these steps, it may be beneficial to engage your SAP support team or a consultant for further assistance.