ED255 - Source code has a read lock

SAP Error Message - Details

• Message type: E = Error

• Message class: ED - ABAP/4 Editor messages

• Message number: 255

• Message text: Source code has a read lock

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 ED255 - Source code has a read lock ?

  The SAP error message ED255, which states "Source code has a read lock," typically occurs when a user attempts to access or modify an ABAP program or object that is currently locked for reading by another user or process. This locking mechanism is in place to prevent simultaneous changes that could lead to inconsistencies or data corruption.
  Cause:
  
  Concurrent Access: Another user or process is currently viewing or editing the same object (e.g., an ABAP program, function module, or class).
  Long-Running Transactions: A transaction that has been opened for a long time may hold a read lock on the object.
  Development Environment: In a development environment, multiple developers may be trying to access the same object simultaneously.
  
  Solution:
  
  Wait and Retry: If the lock is temporary, simply waiting for a few moments and then retrying the action may resolve the issue.
  Identify the Lock: Use transaction code SM12 to check for locks. You can filter by the object name or user to see who is holding the lock.
  Contact the User: If you identify the user who has the lock, you can contact them to see if they can release it.
  Release the Lock: If necessary and if you have the appropriate authorizations, you can manually delete the lock entry in SM12. However, this should be done with caution, as it may disrupt the other user's work.
  Check for Long-Running Transactions: If a transaction is taking too long, investigate why it is running long and if it can be optimized or terminated.
  Use Transport Requests: If you are working in a development environment, consider using transport requests to manage changes more effectively and avoid conflicts.
  
  Related Information:
  
  Lock Management: SAP uses a locking mechanism to ensure data integrity. Understanding how locks work in SAP can help you manage and troubleshoot these issues more effectively.
  Development Best Practices: In a team environment, establish best practices for accessing and modifying shared objects to minimize conflicts.
  SAP Notes: Check SAP Notes for any specific guidance or patches related to this error message, as there may be updates or known issues that could provide additional context or solutions.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.