How To Fix WSUBST027 - Error while creating the switchover information

SAP Error Message - Details

• Message type: E = Error

• Message class: WSUBST - Substitution Article Handling

• Message number: 027

• Message text: Error while creating the switchover information

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WSUBST027 - Error while creating the switchover information ?

  SAP Error Message:
  
  WSUBST027 - Error while creating the switchover information
  
  Cause:
  This error typically occurs during the switchover process in SAP systems that use System Replication or High Availability (HA) setups, especially with SAP HANA databases. The message indicates that the system encountered a problem while trying to create or update the switchover information, which is essential for managing the failover or switchover between primary and secondary systems.
  Common causes include:
  
  Incorrect or incomplete configuration of system replication or switchover parameters.
  Network connectivity issues between primary and secondary systems.
  Insufficient authorizations or missing roles required to perform the switchover.
  Database or system inconsistencies, such as replication lag or synchronization problems.
  File system or permission issues where switchover information is stored.
  Version incompatibilities between primary and secondary systems.
  
  
  Solution:
  To resolve the WSUBST027 error, follow these steps:
  
  
  Check System Replication Status:
  
  Use SAP HANA Studio or HANA Cockpit to verify the replication status.
  Run SQL commands like:
  SELECT * FROM SYS.M_SYSTEM_REPLICATION;
  
  Ensure the secondary system is synchronized and in the correct state.
  
  
  
  Verify Configuration:
  
  Confirm that the switchover parameters are correctly set in the system profiles (DEFAULT.PFL or instance profiles).
  Check the configuration files for system replication and switchover.
  
  
  
  Check Network Connectivity:
  
  Ensure that the primary and secondary systems can communicate over the required ports.
  Use ping, telnet, or other network tools to verify connectivity.
  
  
  
  Review Authorizations:
  
  Make sure the user performing the switchover has the necessary SAP roles and database privileges.
  For HANA, the user typically needs SYSTEM privileges or specific system replication roles.
  
  
  
  Inspect Logs:
  
  Check the SAP system logs (SM21), developer traces (ST11), and HANA trace files for detailed error messages.
  Look for any related errors that might give more context.
  
  
  
  File System and Permissions:
  
  Verify that the directories and files used for switchover information are accessible and writable by the SAP system user.
  
  
  
  Synchronize Systems:
  
  If replication lag or inconsistencies are detected, try to resynchronize the secondary system.
  Use commands like:
  ALTER SYSTEM REPLICATE DATABASE;
  
  
  
  
  SAP Notes and Support:
  
  Search for SAP Notes related to WSUBST027 on the SAP Support Portal.
  Apply any recommended patches or corrections.
  
  
  
  
  Related Information:
  
  
  Transaction / Tools:
  
  SAPHANA Studio or HANA Cockpit for monitoring system replication.
  SAP transaction SM21 for system logs.
  SAP transaction ST11 for developer traces.
  SQL Console for running system replication queries.
  
  
  
  SAP Notes:
  
  Check SAP Notes for known issues with system replication and switchover errors.
  Example Note IDs might include those related to system replication or HA switchover errors.
  
  
  
  Documentation:
  
  SAP HANA System Replication Guide.
  SAP High Availability and Disaster Recovery documentation.
  
  
  
  
  If the problem persists after these checks, consider raising a support ticket with SAP, providing detailed logs and system information.