How To Fix RSAN_MDL104 - Assignment is not possible; the target has already been assigned

SAP Error Message - Details

• Message type: E = Error

• Message class: RSAN_MDL - Messages on Analysis Object Model

• Message number: 104

• Message text: Assignment is not possible; the target has already been assigned

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 RSAN_MDL104 - Assignment is not possible; the target has already been assigned ?

  The SAP error message RSAN_MDL104 indicates that there is an issue with the assignment of a target in the context of SAP BW (Business Warehouse) or SAP BW/4HANA. Specifically, it means that the target object you are trying to assign has already been assigned to another source or target, and therefore, the assignment you are attempting is not possible.
  Cause:
  
  Duplicate Assignment: The target object (like a DataStore Object, InfoCube, or other targets) is already assigned to another source or target in the data flow.
  Configuration Error: There may be a misconfiguration in the data model or data flow setup, leading to conflicts in assignments.
  Data Model Changes: Changes made to the data model or data flow that have not been properly updated or saved can lead to this error.
  
  Solution:
  
  
  Check Existing Assignments: 
  
  Go to the relevant data model or data flow in the SAP BW system and check the existing assignments for the target object. Ensure that it is not already assigned to another source or target.
  
  
  
  Remove or Modify Existing Assignments:
  
  If the target is indeed assigned elsewhere and you need to reassign it, you may need to remove the existing assignment first. This can usually be done in the modeling tools of SAP BW.
  
  
  
  Review Data Flow:
  
  Review the entire data flow to ensure that there are no conflicting assignments. Make sure that the data flow is logically consistent and that all objects are correctly configured.
  
  
  
  Check for Locks:
  
  Sometimes, objects can be locked by other users or processes. Ensure that there are no locks on the target object that might be preventing the assignment.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidance on the data model you are working with, as there may be nuances based on the version of SAP BW you are using.
  
  
  
  Transport Requests:
  
  If the issue arose after a transport, ensure that all related objects were transported correctly and that there are no inconsistencies in the target system.
  
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like RSA1 (Data Warehousing Workbench) to navigate to the relevant data model and check assignments.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  Community Forums: Consider visiting SAP Community forums or other user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify the cause of the RSAN_MDL104 error and implement a solution to resolve it.