How To Fix SY281 - Current program was modified while running

SAP Error Message - Details

• Message type: E = Error

• Message class: SY - ABAP/4 system messages

• Message number: 281

• Message text: Current program was modified while running

What causes this issue?

Program &1& has been modified while the program was running.
Since the program is no longer in the PXA buffer, and the version that
was valid when the program was started no longer exists in the
database, the program run was terminated.

How to fix this error?

To analyze the problem further, consult the short dump (Transaction
ST22).

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SY281 - Current program was modified while running ?

  The SAP error message SY281, which states "Current program was modified while running," typically occurs when a program or transaction is being executed, and the underlying code is changed during its execution. This can happen in various scenarios, such as:
  Causes:
  
  Code Changes: A developer modifies the ABAP code of a program while it is still running. This can happen if the program is being debugged or if a transport is being imported that includes changes to the program.
  Transport Requests: If a transport request is imported while users are executing the program, it can lead to this error.
  Development Environment: In a development environment, if multiple developers are working on the same program and one of them saves changes while another is executing it, this error can occur.
  Long-Running Transactions: If a transaction takes a long time to execute and changes are made to the program in the meantime, this error may be triggered.
  
  Solutions:
  
  Avoid Concurrent Modifications: Ensure that no changes are made to the program while it is being executed. This can be managed by coordinating development efforts and using version control.
  Use Transport Management System (TMS): When moving changes between environments (e.g., from development to production), ensure that the program is not being executed during the transport import.
  Check for Long-Running Processes: If a program is known to take a long time to execute, consider breaking it down into smaller parts or optimizing it to reduce execution time.
  Restart the Program: If you encounter this error, you may need to restart the program or transaction after ensuring that no changes are being made to the code.
  Debugging: If you are debugging a program, make sure to stop the debugging session before making any changes to the code.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific guidance or patches related to this error. SAP frequently updates its knowledge base with solutions for common issues.
  System Logs: Review system logs (transaction SM21) for any additional information that might help diagnose the issue.
  ABAP Development Guidelines: Follow best practices for ABAP development, including proper version control and change management processes.
  
  By following these guidelines, you can minimize the occurrence of the SY281 error and ensure smoother operation of your SAP environment.