How To Fix /SCF/UI_SAPGUI_MESS018 - System error: Sequence number for component &1 is not unique

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCF/UI_SAPGUI_MESS -

• Message number: 018

• Message text: System error: Sequence number for component &1 is not unique

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 /SCF/UI_SAPGUI_MESS018 - System error: Sequence number for component &1 is not unique ?

  The SAP error message /SCF/UI_SAPGUI_MESS018 System error: Sequence number for component &1 is not unique typically indicates that there is a problem with the sequence number assigned to a component in the SAP system. This error can occur in various scenarios, particularly when dealing with UI components or configurations in SAP applications.
  Cause:
  
  Duplicate Sequence Numbers: The most common cause of this error is that there are multiple components with the same sequence number in the configuration or definition of the UI components. This can happen due to incorrect configuration or manual changes made to the UI components.
  Data Consistency Issues: There may be inconsistencies in the data stored in the database, leading to duplicate entries for sequence numbers.
  Transport Issues: If changes were transported from one system to another (e.g., from development to production), there might be conflicts or duplicates introduced during the transport process.
  
  Solution:
  
  Check Configuration: Review the configuration of the UI components in the relevant transaction (e.g., using transaction codes like SE80, SE11, or SE37 depending on the context). Ensure that each component has a unique sequence number.
  Database Check: If you have access to the database, you can run queries to check for duplicate sequence numbers in the relevant tables. This may require assistance from a database administrator.
  Adjust Sequence Numbers: If duplicates are found, adjust the sequence numbers to ensure they are unique. This may involve changing the sequence number of one or more components.
  Transport Management: If the issue arose after a transport, check the transport logs and ensure that the transport did not introduce duplicates. You may need to re-transport or adjust the components manually.
  Clear Cache: Sometimes, clearing the SAP GUI cache or the application cache can resolve transient issues. You can do this by deleting the cache files or using transaction SICF to reset the service.
  Consult Documentation: Refer to SAP Notes or documentation related to the specific component or application you are working with. There may be known issues or patches available.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues related to this error message. You can search for the error message or related keywords in the SAP Support Portal.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  System Logs: Review system logs (transaction SM21) for any additional error messages or warnings that may provide more context about the issue.
  
  If the problem persists after trying the above solutions, it may be necessary to involve SAP support for further assistance.