How To Fix RSM1635 - Cannot set lock for delta/init requirement from DS '&1' and src. sys '&2'

SAP Error Message - Details

• Message type: E = Error

• Message class: RSM1 - Messages for AWB, Scheduler and Monitor (new)

• Message number: 635

• Message text: Cannot set lock for delta/init requirement from DS '&1' and src. sys '&2'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSM1635 - Cannot set lock for delta/init requirement from DS '&1' and src. sys '&2' ?

  The SAP error message RSM1635 indicates that there is an issue with setting a lock for a delta or initialization requirement from a DataSource (DS) in a source system. This error typically occurs in the context of SAP BW (Business Warehouse) when trying to extract data from a source system.
  Cause:
  The error can be caused by several factors, including:
  
  Locking Issues: The system may be unable to acquire a lock on the delta or initialization request due to existing locks held by other processes or users.
  DataSource Configuration: There may be issues with the configuration of the DataSource itself, such as incorrect settings or missing parameters.
  Source System Connectivity: Problems with the connection to the source system can also lead to this error, such as network issues or incorrect connection settings.
  Authorization Issues: The user executing the extraction may not have the necessary authorizations to perform the operation.
  System Performance: High load on the source system or BW system can lead to timeouts or failures in acquiring locks.
  
  Solution:
  To resolve the RSM1635 error, you can take the following steps:
  
  Check Locks: Use transaction code SM12 in the SAP GUI to check for existing locks on the DataSource. If there are locks that are no longer needed, you can delete them.
  Review DataSource Configuration: Ensure that the DataSource is correctly configured. Check the settings in transaction RSA1 (Data Warehousing Workbench) and ensure that the DataSource is active and properly set up.
  Test Connection: Verify the connection to the source system using transaction RSA3 (DataSource Test). This will help identify if there are any connectivity issues.
  Check Authorizations: Ensure that the user has the necessary authorizations to perform the extraction. This includes authorizations for the DataSource and the relevant InfoObjects.
  Monitor System Performance: Check the performance of both the source and BW systems. If either system is under heavy load, consider scheduling the extraction during off-peak hours.
  Restart the Process: If the issue persists, try restarting the extraction process or the entire BW process chain.
  
  Related Information:
  
  Transaction Codes: 
  
  SM12: Display and manage locks
  RSA1: Data Warehousing Workbench
  RSA3: Test DataSource
  
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Logs: Review the application logs (transaction SLG1) for more detailed error messages that may provide further insights into the issue.
  
  If the problem continues after trying these solutions, it may be necessary to consult with your SAP Basis team or SAP support for further assistance.