How To Fix RSDHA303 - Mandatory mapping for key field '&1' of target table '&2' missing

RSDHA303 - Overview

• Message type: E = Error

• Message class: RSDHA - HANA Analysis in BW

• Message number: 303

• Message text: Mandatory mapping for key field '&1' of target table '&2' missing

Self-Explanatory Message

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RSDHA303 - Details

• The SAP error message RSDHA303 indicates that there is a mandatory mapping issue for a key field in a target table. This typically occurs in the context of data modeling in SAP BW (Business Warehouse) or when working with InfoObjects and DataSources.
  
  Cause:
  The error arises when a key field in the target table (usually an InfoObject or a DataStore Object) does not have a corresponding mapping defined in the transformation or data flow. This means that the system cannot determine how to populate that key field with data from the source.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check the Transformation:
  
  Go to the transformation that is causing the error.
  Ensure that all mandatory fields in the target table are mapped correctly from the source fields. 
  
  
  
  Mapping Configuration:
  
  If the key field is not mapped, you need to create a mapping for it. This can be done by:
  Opening the transformation in the SAP BW