How To Fix /UI2/FCM126 - Target mapping '&1' could not be added because an error occurred:

SAP Error Message - Details

• Message type: E = Error

• Message class: /UI2/FCM -

• Message number: 126

• Message text: Target mapping '&1' could not be added because an error occurred:

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 /UI2/FCM126 - Target mapping '&1' could not be added because an error occurred: ?

  The SAP error message /UI2/FCM126 Target mapping '&1' could not be added because an error occurred typically relates to issues in the configuration of the Fiori Launchpad, specifically when trying to add or modify target mappings for Fiori applications.
  Causes:
  
  Incorrect Target Mapping Configuration: The target mapping may have incorrect parameters or values that do not conform to the expected format.
  Missing or Inactive Catalogs: The catalog to which the target mapping is being added may not exist or may be inactive.
  Authorization Issues: The user may not have the necessary authorizations to modify the target mapping or the associated catalog.
  Technical Issues: There may be underlying technical issues, such as database inconsistencies or system errors.
  Transport Issues: If the changes are being transported from one system to another, there may be issues with the transport request.
  
  Solutions:
  
  Check Target Mapping Configuration: Review the target mapping configuration for any errors. Ensure that all required fields are filled out correctly.
  Verify Catalog Status: Ensure that the catalog to which you are trying to add the target mapping is active and exists in the system.
  Check Authorizations: Verify that the user has the necessary authorizations to make changes to the target mapping and the associated catalog.
  Review System Logs: Check the system logs (transaction SLG1) for any additional error messages or details that can provide more context about the issue.
  Test in a Different Environment: If possible, try to replicate the issue in a development or test environment to see if the problem persists.
  Transport Request: If the issue is related to a transport request, ensure that the transport is correctly configured and that all necessary objects are included.
  
  Related Information:
  
  Fiori Launchpad Configuration: Familiarize yourself with the Fiori Launchpad configuration and the role of target mappings and catalogs.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide patches related to this error.
  Documentation: Refer to the official SAP documentation for Fiori Launchpad and target mapping for detailed guidance on configuration and troubleshooting.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance.