How To Fix R9158 - InfoObject "&1" must be unique throughout structure "&2"

SAP Error Message - Details

• Message type: E = Error

• Message class: R9 - Business Explorer

• Message number: 158

• Message text: InfoObject "&1" must be unique throughout structure "&2"

What causes this issue?

InfoObject "&V1&" contains the setting that it must be uniquely
determined in all structure elements for structure "&V2&". However,
structure "&V2&" contains structure elements that do not contain
InfoObject "&V1&" with a unique filter.
Note: If a variable was used in the restriction, this variable must
have the type "Single Value" in order to meet this condition.

System Response

The error is reported during the check.

How to fix this error?

Insert a unique selection for InfoObject "&V1&" into each structure
element, or delete the InfoObject from all structure elements and
insert the InfoObjects into the filter with a unique selection.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message R9158 - InfoObject "&1" must be unique throughout structure "&2" ?

  The SAP error message R9158 indicates that there is a problem with the uniqueness of an InfoObject within a structure in SAP BW (Business Warehouse). Specifically, it means that the InfoObject specified (represented by "&1") is not unique within the structure (represented by "&2"). This can occur when you are trying to create or modify a data structure, such as an InfoCube, DataStore Object (DSO), or MultiProvider, and the system detects that the same InfoObject is being used more than once in the same context.
  Cause:
  
  Duplicate InfoObjects: The most common cause of this error is that the same InfoObject has been added multiple times to the same structure. In BW, each InfoObject must be unique within a given structure to avoid ambiguity in data processing.
  Incorrect Configuration: Sometimes, the error can arise from incorrect configuration or design of the data model, where the same InfoObject is mistakenly included in the structure.
  Copying Structures: If you have copied a structure or InfoProvider, it may inadvertently include duplicate InfoObjects.
  
  Solution:
  
  Check the Structure: Review the structure (e.g., InfoCube, DSO, MultiProvider) where the error is occurring. Ensure that each InfoObject is included only once.
  Remove Duplicates: If you find that the same InfoObject is included multiple times, remove the duplicates from the structure.
  Revalidate the Structure: After making changes, revalidate the structure to ensure that the error is resolved.
  Check Dependencies: If the InfoObject is used in other related structures, ensure that those dependencies are also considered when making changes.
  Transport Requests: If this error occurs during a transport, ensure that the transport request does not contain conflicting definitions.
  
  Related Information:
  
  InfoObjects: These are the building blocks of the BW data model, representing characteristics (dimensions) and key figures (measures).
  Data Modeling: Understanding the principles of data modeling in SAP BW is crucial for avoiding such errors. Each InfoObject should have a clear and unique role within the data model.
  SAP Notes: Check for any relevant SAP Notes or documentation that may provide additional insights or updates related to this error message.
  Transaction Codes: Familiarize yourself with transaction codes like RSA1 (Data Warehousing Workbench) to manage and troubleshoot InfoObjects and structures.
  
  By following these steps, you should be able to resolve the R9158 error and ensure that your data structures are correctly configured in SAP BW.