How To Fix UCR1001 - The first of &1 rows is already being displayed

SAP Error Message - Details

• Message type: E = Error

• Message class: UCR1 - Messages for List Reporting

• Message number: 001

• Message text: The first of &1 rows is already being displayed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message UCR1001 - The first of &1 rows is already being displayed ?

  The SAP error message UCR1001, which states "The first of &1 rows is already being displayed," typically occurs in the context of SAP's User Interface (UI) technologies, particularly when dealing with ALV (ABAP List Viewer) grids or similar display components. This error indicates that the system is trying to display a set of data that is already being shown in the UI, leading to a conflict.
  Cause:
  
  Duplicate Display Request: The error often arises when a user or a program attempts to display a dataset that is already being rendered in the UI. This can happen if a user clicks a button or link multiple times, or if there is a programmatic error that triggers the display function more than once.
  Session Management Issues: If multiple sessions or tabs are open, and the same data is being requested in different contexts, it can lead to this error.
  Buffering Issues: Sometimes, the internal buffering of the UI components may not be cleared properly, leading to attempts to display the same data again.
  
  Solution:
  
  Avoid Duplicate Actions: Ensure that the user interface does not allow multiple clicks or actions that would trigger the same display request. This can be managed through disabling buttons after the first click or implementing checks in the code.
  Session Management: If multiple sessions are open, try to consolidate actions into a single session or ensure that the data is not being requested redundantly across sessions.
  Clear Buffers: If you are developing or customizing the application, ensure that any buffers or internal states are cleared before attempting to display data again. This may involve resetting the state of the UI component or reinitializing the data display logic.
  Error Handling: Implement error handling in your code to catch this specific error and provide a user-friendly message or alternative action.
  
  Related Information:
  
  ALV Grid Control: If you are using ALV, familiarize yourself with the methods and events associated with the ALV grid to manage display states effectively.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. Sometimes, specific versions of SAP may have bugs that are documented and resolved in later updates.
  Debugging: If you are a developer, use debugging tools to trace the execution flow and identify where the duplicate display request is being triggered.
  
  If the issue persists after trying the above solutions, consider reaching out to your SAP support team or consulting the SAP Community for more specific guidance based on your system configuration and usage context.