How To Fix 42843 - There is no unique relationship between the source and display objects

SAP Error Message - Details

• Message type: E = Error

• Message class: 42 - Information Workbench

• Message number: 843

• Message text: There is no unique relationship between the source and display objects

What causes this issue?

You have one of the following errors:
Different source objects have relationships to the same target object.
A source object has multiple relationships to the same target object.

System Response

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

How to fix this error?

Compare the content object displayed in the Web Browser with the
corresponding source object.
If the content object displayed in the Web Browser contains different
information from the source object, correct the difference and save the
source object.
If the content object displayed in the Web Browser is identical with
the source object, save the source object.
The target object is created again and the relationsip to the target
object is restored.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 42843 - There is no unique relationship between the source and display objects ?

  The SAP error message 42843, which states "There is no unique relationship between the source and display objects," typically occurs in the context of SAP Business Warehouse (BW) or when working with InfoObjects, queries, or data models. This error indicates that the system is unable to establish a unique mapping between the source data and the display objects, which can lead to issues in reporting or data retrieval.
  Causes:
  
  Non-Unique Keys: The source data may contain non-unique keys, meaning that there are multiple records in the source that correspond to the same key in the display object.
  Incorrect Data Model: The data model may not be properly defined, leading to ambiguity in how data is related.
  Missing Relationships: There may be missing or incorrectly defined relationships between the source and display objects in the data model.
  Data Inconsistencies: Inconsistencies in the data, such as duplicates or missing values, can also lead to this error.
  
  Solutions:
  
  Check Data Uniqueness: Ensure that the source data has unique keys. You can do this by analyzing the data in the source table or InfoProvider.
  Review Data Model: Examine the data model to ensure that all relationships between source and display objects are correctly defined. This includes checking the InfoObjects, InfoProviders, and any transformations.
  Define Relationships: If there are missing relationships, define them in the data model. This may involve creating new joins or modifying existing ones.
  Data Cleansing: Clean the source data to remove duplicates or inconsistencies. This may involve using data cleansing tools or processes to ensure that the data adheres to the expected structure.
  Check Query Design: If the error occurs in a query, review the query design to ensure that the key figures and characteristics are correctly defined and that there are no conflicting definitions.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like RSA1 (Data Warehousing Workbench) to analyze and modify the data model.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance.
  Documentation: Refer to SAP documentation on BW modeling and query design for best practices and troubleshooting steps.
  Testing: After making changes, test the data retrieval or reporting functionality to ensure that the error has been resolved.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.