How To Fix MY428 - Delta run cannot be locked

SAP Error Message - Details

• Message type: E = Error

• Message class: MY - Messages for Balance Sheet Valuation(Low.Val.Det./LIFO/FIFO)

• Message number: 428

• Message text: Delta run cannot be locked

What causes this issue?

You tried to lock a delta run with the argument &V1&. The lock request
failed because the delta run is already locked.
<ZH>&HINT&</>
The lock argument comprises the values for the delta run, period, plant,
and valuation class.

System Response

Processing is terminated.

How to fix this error?

Make sure that the delta run is not currently being processed by another
user or process.

Procedure for System Administrators

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 MY428 - Delta run cannot be locked ?

  The SAP error message MY428, which states "Delta run cannot be locked," typically occurs in the context of the SAP BW (Business Warehouse) system during the execution of delta loads. This error indicates that the delta process is unable to acquire a lock on the data that it needs to process, which can prevent the delta load from completing successfully.
  Causes:
  
  Concurrent Delta Loads: If multiple delta loads are trying to run simultaneously for the same data source, one may block the other from acquiring the necessary locks.
  Long-Running Processes: A long-running process or a previous delta load that has not yet completed can hold the lock, preventing new delta runs from starting.
  System Configuration Issues: Misconfigurations in the data source or the extraction process can lead to locking issues.
  Database Locks: Locks at the database level can also cause this issue, especially if there are transactions that are not being released properly.
  
  Solutions:
  
  Check for Running Processes: Use transaction codes like SM66 or SM50 to check for any active processes that might be holding locks. If you find any long-running delta processes, you may need to terminate them if they are stuck.
  Review Delta Queue: Check the delta queue for the data source in question. You can use transaction RSA7 to monitor the delta queue and see if there are any issues.
  Restart the Process: If you identify that a delta process is stuck, you may need to restart it. This can sometimes resolve locking issues.
  Adjust Scheduling: If concurrent delta loads are a frequent issue, consider adjusting the scheduling of your delta loads to avoid overlaps.
  Database Monitoring: If you suspect database locks, you may need to check the database logs or use database-specific tools to identify and resolve any locking issues.
  System Configuration Review: Ensure that your system configuration is set up correctly for delta processing. This includes checking the settings for the data source and the extraction process.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA1 (Data Warehousing Workbench), RSA7 (Delta Queue Monitor), and SM66/SM50 (Process Overview).
  SAP Notes: Check SAP Notes for any known issues or patches related to the MY428 error. SAP frequently updates its knowledge base with solutions for common problems.
  Documentation: Review SAP documentation on delta processing and locking mechanisms to better understand how to manage and troubleshoot these issues.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.