How To Fix /UI2/SAP_NWBC020 - Screen number &1 is not valid

SAP Error Message - Details

• Message type: E = Error

• Message class: /UI2/SAP_NWBC -

• Message number: 020

• Message text: Screen number &1 is not valid

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 /UI2/SAP_NWBC020 - Screen number &1 is not valid ?

  The SAP error message /UI2/SAP_NWBC020 Screen number &1 is not valid typically occurs in the context of the SAP NetWeaver Business Client (NWBC) or when using SAP Fiori applications. This error indicates that the system is trying to access a screen or transaction that is not recognized or does not exist in the current context.
  Causes:
  
  Invalid Screen Number: The screen number referenced in the error message does not exist in the system. This could be due to a typo or an outdated reference.
  Missing Authorization: The user may not have the necessary authorizations to access the specified screen or transaction.
  Configuration Issues: There may be issues with the configuration of the NWBC or Fiori launchpad that are causing the system to reference an invalid screen.
  System Upgrade or Changes: If the system has been recently upgraded or modified, certain screens or transactions may have been removed or changed, leading to this error.
  Incorrect Role Assignment: The user may not have the correct roles assigned that include access to the required screens.
  
  Solutions:
  
  Verify Screen Number: Check the screen number referenced in the error message. Ensure that it is correct and exists in the system.
  Check Authorizations: Review the user's authorizations to ensure they have access to the required transactions and screens. Use transaction SU53 to analyze authorization issues.
  Review Configuration: If you are an administrator, check the configuration settings in the NWBC or Fiori launchpad to ensure that all necessary screens and transactions are properly configured.
  Consult Documentation: If the error occurred after a system upgrade, consult the release notes or documentation for any changes that may have affected the screen or transaction.
  Role Assignment: Ensure that the user has the correct roles assigned that include access to the required screens. You can check this in transaction PFCG.
  Contact Support: If the issue persists, consider reaching out to SAP support for further assistance, especially if it seems to be a system-wide issue.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE80 (Object Navigator), SU53 (Authorization Check), and PFCG (Role Maintenance) for troubleshooting.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error or provide additional troubleshooting steps.
  Community Forums: Check SAP Community forums or other user groups for similar issues and solutions shared by other users.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution.