How To Fix /BCV/SIN002 - Only one master system is allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: /BCV/SIN -

• Message number: 002

• Message text: Only one master system 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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message /BCV/SIN002 - Only one master system is allowed ?

  The SAP error message /BCV/SIN002 Only one master system is allowed typically occurs in the context of SAP Landscape Management (LaMa) or when dealing with system replication scenarios, particularly in a High Availability (HA) setup. This error indicates that the system you are trying to configure or manage is already designated as a master system, and the system does not allow multiple master systems in the same landscape.
  Cause:
  
  Multiple Master Systems: The primary cause of this error is that there is already an existing master system configured in the landscape, and you are attempting to configure another system as a master.
  Configuration Issues: There may be misconfigurations in the system landscape that lead to the system being recognized as a master when it should not be.
  Replication Settings: In scenarios involving system replication, the settings may not be correctly defined, leading to confusion about which system is the master.
  
  Solution:
  
  Check Existing Master System: Verify which system is currently configured as the master. You can do this by checking the configuration in the SAP Landscape Management tool or the relevant transaction codes.
  Remove or Reconfigure: If you need to change the master system, you will have to remove the existing master designation from the current master system before you can designate a new one. This may involve:
  
  Accessing the configuration settings in SAP LaMa or the relevant management tool.
  Changing the system role from master to a different role (like a slave or secondary).
  
  
  Review Documentation: Consult the SAP documentation for your specific version and setup to ensure that you are following the correct procedures for configuring master and slave systems.
  System Logs: Check system logs for any additional error messages or warnings that might provide more context about the issue.
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, especially if you suspect a bug or a more complex configuration issue.
  
  Related Information:
  
  SAP Notes: Look for relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can share their solutions.
  Documentation: Review the official SAP documentation for Landscape Management or the specific module you are working with to understand the configuration requirements and limitations.
  
  By following these steps, you should be able to resolve the /BCV/SIN002 Only one master system is allowed error and properly configure your SAP landscape.