How To Fix WSUBST026 - Error while reading Customizing settings for switchover information

SAP Error Message - Details

• Message type: E = Error

• Message class: WSUBST - Substitution Article Handling

• Message number: 026

• Message text: Error while reading Customizing settings for switchover information

Self-Explanatory Message

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• What is the cause and solution for SAP error message WSUBST026 - Error while reading Customizing settings for switchover information ?

  SAP Error Message:
  
  WSUBST026 - Error while reading Customizing settings for switchover information
  
  Cause:
  This error typically occurs when the system tries to read the switchover customizing settings but encounters missing or inconsistent configuration data. The switchover settings are part of the system's configuration for handling system availability, such as during system copy, system refresh, or system switchover scenarios (e.g., in high availability or system landscape management).
  Common causes include:
  
  Missing or incomplete entries in the switchover customizing tables.
  Inconsistent or corrupted customizing data related to system switchover.
  Transport or system copy activities that did not properly update the switchover customizing.
  Authorization issues preventing the system from reading the customizing data.
  Issues with the table TWSWITCH or related tables that store switchover information.
  
  
  Solution:
  
  
  Check Switchover Customizing:
  
  Go to transaction SWITCH or SM30 and check the customizing tables related to switchover, such as TWSWITCH.
  Verify that all required entries are present and consistent.
  
  
  
  Reimport or Reapply Customizing:
  
  If the customizing data is missing or corrupted, reimport the relevant customizing transport requests.
  Alternatively, manually reconfigure the switchover settings if possible.
  
  
  
  Check Authorizations:
  
  Ensure the user executing the operation has the necessary authorizations to read the switchover customizing.
  
  
  
  Check System Logs and ST22 Dumps:
  
  Look for related short dumps or system log entries that might provide more detailed information about the failure.
  
  
  
  SAP Notes and Support:
  
  Search for SAP Notes related to WSUBST026 for any known bugs or patches.
  Example SAP Note to check: Note 1234567 (replace with actual note number if found).
  If no solution is found, raise a support ticket with SAP including system details and logs.
  
  
  
  
  Related Information:
  
  
  Switchover Customizing Tables:  
  
  TWSWITCH – Main table for switchover settings.
  Other related tables might include TWSWITCHLOG, TWSWITCHPARAM.
  
  
  
  Transactions:
  
  SWITCH – Manage system switchover settings.
  SM30 – Table maintenance for customizing tables.
  ST22 – Check for dumps.
  SM21 – System log.
  
  
  
  Context:
  
  This error often appears during system copy, system refresh, or when performing system switchover in high availability environments.
  It may also appear during transport imports or system upgrades if switchover customizing is affected.
  
  
  
  
  If you provide more context (e.g., when exactly the error occurs, system version, recent changes), I can help narrow down the troubleshooting steps further.