How To Fix STREX120 - Operation not allowed on a read only index

SAP Error Message - Details

• Message type: E = Error

• Message class: STREX - Message for TREX ABAP Client

• Message number: 120

• Message text: Operation not allowed on a read only index

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message STREX120 - Operation not allowed on a read only index ?

  The SAP error message STREX120, which states "Operation not allowed on a read-only index," typically occurs when there is an attempt to perform a write operation (such as an update, delete, or insert) on an index that is set to read-only. This can happen in various contexts, such as when working with database indexes or when using certain data structures in ABAP programs.
  Cause:
  
  Read-Only Index: The index you are trying to modify is marked as read-only. This can happen if the index is part of a database view or if it has been explicitly set to read-only in the application logic.
  Database Locking: The index might be locked due to a transaction that is currently in progress, preventing any modifications.
  Incorrect Logic: The program logic may be attempting to perform an operation that is not allowed on the specified index.
  
  Solution:
  
  Check Index Properties: Verify the properties of the index in question. Ensure that it is not set to read-only if you need to perform write operations.
  Review Program Logic: Look at the ABAP code or the logic that is attempting to modify the index. Ensure that you are not trying to perform write operations on a read-only index.
  Database Configuration: If the index is part of a database view, consider whether you need to change the view definition or create a new index that allows write operations.
  Transaction Management: If the index is locked due to an ongoing transaction, wait for the transaction to complete or investigate the locking issue.
  Consult Documentation: Refer to SAP documentation or help resources for specific details about the index and its intended use.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  Transaction Codes: Use transaction codes like SE11 (Data Dictionary) to inspect the index and its properties.
  Debugging: If you have access to the ABAP debugger, you can step through the code to identify where the error occurs and understand the context better.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  
  If the problem persists after trying the above solutions, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.