How To Fix E2255 - Column 'Key' (key field) is hidden

SAP Error Message - Details

• Message type: E = Error

• Message class: E2 - DE Data Dictionary

• Message number: 255

• Message text: Column 'Key' (key field) is hidden

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 E2255 - Column 'Key' (key field) is hidden ?

  The SAP error message E2255, which states "Column 'Key' (key field) is hidden," typically occurs in the context of SAP applications when a key field that is necessary for processing is not visible or accessible in the current view or context. This can happen in various scenarios, such as when working with reports, queries, or data entry screens.
  Cause:
  
  Field Configuration: The key field may be configured to be hidden in the screen layout or report settings. This can happen due to customization or specific settings in the SAP system.
  User Authorizations: The user may not have the necessary authorizations to view or access the key field.
  Data Model Changes: Changes in the underlying data model or database structure may lead to certain fields being hidden or removed from the user interface.
  Technical Issues: There may be technical issues or bugs in the SAP system that cause the field to be hidden unexpectedly.
  
  Solution:
  
  
  Check Field Configuration:
  
  Go to the relevant transaction or report where the error occurs.
  Check the layout settings to ensure that the key field is not set to be hidden. You may need to adjust the settings to make the field visible.
  
  
  
  Review User Authorizations:
  
  Ensure that the user has the necessary authorizations to view the key field. This can be checked in the user roles and profiles assigned to the user.
  
  
  
  Consult with SAP Basis or Development Team:
  
  If the issue persists, consult with your SAP Basis or development team to check for any recent changes in the data model or system configuration that may have affected the visibility of the key field.
  
  
  
  Debugging:
  
  If you have access to debugging tools, you can analyze the program or report to see why the field is being hidden. This may require technical expertise.
  
  
  
  SAP Notes and Support:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message. There may be patches or updates available that resolve the issue.
  
  
  
  Reconfigure the Report or Screen:
  
  If the error occurs in a custom report or screen, consider reconfiguring it to ensure that the key field is included and visible.
  
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for the specific module or transaction you are working with for more details on field configurations and settings.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Training and Resources: Consider training sessions or resources that cover SAP screen and report customization to better understand how to manage field visibility.
  
  By following these steps, you should be able to identify the cause of the E2255 error and implement a suitable solution.