How To Fix ATAB021 - Group &1 is assigned to several tabs in tab layout &2.

SAP Error Message - Details

• Message type: E = Error

• Message class: ATAB - Tabs in master data: Messages

• Message number: 021

• Message text: Group &1 is assigned to several tabs in tab layout &2.

What causes this issue?

Group box &v1& appears on more than one tab (&v3&) of tab layout &v2&.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

If you do not want this to be so, check the group boxes assigned to
each of the tabs and remove multiple entries.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message ATAB021 - Group &1 is assigned to several tabs in tab layout &2. ?

  The SAP error message ATAB021 indicates that a specific group (denoted as &1) is assigned to multiple tabs in a tab layout (denoted as &2). This situation typically arises in the context of customizing the user interface in SAP, particularly when working with tab layouts in transactions or screens.
  Cause:
  The error occurs because the same group is being assigned to more than one tab in the same tab layout. In SAP, each group should be unique to a tab to avoid confusion and ensure proper functionality. When a group is assigned to multiple tabs, it can lead to conflicts in data display or user interaction.
  Solution:
  To resolve this error, you need to ensure that each group is assigned to only one tab within the specified tab layout. Here are the steps to fix the issue:
  
  
  Identify the Tab Layout: Determine which tab layout is causing the error. This is indicated by &2 in the error message.
  
  
  Check Group Assignments: Review the group assignments for the tabs in the specified tab layout. You can do this by navigating to the relevant configuration or customizing transaction where the tab layout is defined.
  
  
  Modify Group Assignments:
  
  If you find that the same group (indicated by &1) is assigned to multiple tabs, you will need to change the assignment.
  Either remove the group from one of the tabs or create a new group for one of the tabs to ensure that each group is unique to its respective tab.
  
  
  
  Save Changes: After making the necessary adjustments, save your changes.
  
  
  Test the Configuration: After saving, test the tab layout to ensure that the error no longer appears and that the layout functions as expected.
  
  
  Related Information:
  
  Transaction Codes: Depending on your SAP version and configuration, you may use transaction codes like SE80 (Object Navigator) or SE41 (Menu Painter) to access and modify tab layouts.
  Documentation: Refer to SAP Help documentation or your organization's internal documentation for guidelines on customizing tab layouts and managing groups.
  Transport Requests: If you are working in a development environment, ensure that your changes are included in a transport request for moving to production.
  
  By following these steps, you should be able to resolve the ATAB021 error and ensure that your tab layout is correctly configured.