How To Fix 6G156 - As database for system &1, only &2 is allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: 6G - Messages for System Administration Assistant

• Message number: 156

• Message text: As database for system &1, only &2 is allowed

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message 6G156 - As database for system &1, only &2 is allowed ?

  The SAP error message 6G156 indicates that there is a mismatch between the database type configured for the SAP system and the database type that is currently being used or allowed. The message typically states: "As database for system &1, only &2 is allowed," where &1 represents the system name and &2 represents the allowed database type.
  Cause:
  This error usually occurs due to one of the following reasons:
  
  Incorrect Database Configuration: The SAP system is configured to use a specific database type, but the actual database being used does not match this configuration.
  Database Migration: If there has been a migration from one database type to another, the system may still be configured to use the old database type.
  Installation Issues: During the installation or upgrade of the SAP system, the database type may not have been set correctly.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check System Configuration:
  
  Use transaction code RZ10 to check the profile parameters and ensure that the database type is correctly set.
  Verify the database type in the SAP system configuration (e.g., using transaction DBACOCKPIT).
  
  
  
  Database Type Verification:
  
  Confirm the actual database type being used by the SAP system. You can do this by checking the database connection settings or using the database management tools.
  
  
  
  Adjust Configuration:
  
  If the database type is incorrect, you may need to adjust the configuration to match the actual database being used. This may involve changing the instance profile or modifying the database connection settings.
  
  
  
  Reinstall or Migrate:
  
  If the database type has changed (e.g., due to migration), you may need to reinstall or reconfigure the SAP system to align with the new database type.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation for your specific version and database type for detailed instructions on how to configure the system correctly.
  
  
  
  Contact SAP Support:
  
  If you are unable to resolve the issue, consider reaching out to SAP support for assistance, especially if this is a production system.
  
  
  
  Related Information:
  
  Transaction Codes: RZ10, DBACOCKPIT, SICF, SM51 (to check active instances).
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on database configuration.
  Database Documentation: Review the documentation for the specific database you are using (e.g., HANA, Oracle, SQL Server) for any additional configuration steps.
  
  By following these steps, you should be able to identify the cause of the error and implement the necessary changes to resolve it.