How To Fix /SMB/FUNCTION_SWITCH028 - Switch for foreign key check is already switched on

SAP Error Message - Details

• Message type: E = Error

• Message class: /SMB/FUNCTION_SWITCH -

• Message number: 028

• Message text: Switch for foreign key check is already switched on

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SMB/FUNCTION_SWITCH028 - Switch for foreign key check is already switched on ?

  The SAP error message /SMB/FUNCTION_SWITCH028: Switch for foreign key check is already switched on typically occurs in the context of the SAP Business One or SAP ERP systems when there is an attempt to enable a foreign key check that is already active. This can happen during data entry, configuration, or when executing certain functions that involve foreign key relationships in the database.
  Cause:
  
  Redundant Activation: The error indicates that the system is trying to activate a foreign key check that is already enabled. This can happen if the same operation is attempted multiple times.
  Configuration Issues: There may be a misconfiguration in the system settings or in the specific module you are working with.
  Database Integrity: The foreign key constraints may already be enforced in the database schema, leading to this error when trying to enforce them again.
  
  Solution:
  
  Check Current Settings: Verify the current settings for foreign key checks in the relevant configuration area. Ensure that you are not trying to enable a check that is already active.
  Review Code or Customization: If this error arises from custom code or a specific transaction, review the logic to ensure that it does not attempt to enable the foreign key check redundantly.
  Consult Documentation: Refer to the SAP documentation or help resources for guidance on managing foreign key checks and related settings.
  Database Administration: If you have access to the database, you can check the schema to see if the foreign key constraints are already defined. You may need to adjust your approach based on the existing constraints.
  Contact SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP support for assistance. They can provide insights based on the specific version and configuration of your SAP system.
  
  Related Information:
  
  Foreign Key Constraints: These are rules that maintain referential integrity between tables in a database. They ensure that a value in one table corresponds to a valid value in another table.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide patches or updates that could resolve the issue.
  System Logs: Review system logs for additional error messages or warnings that could provide more context about the issue.
  
  By following these steps, you should be able to diagnose and resolve the error related to the foreign key check in your SAP system.