How To Fix DU604 - Only one key area without a field name is allowed (value area &)

DU604 - Overview

• Message type: E = Error

• Message class: DU - Data transfer to SAP-EIS

• Message number: 604

• Message text: Only one key area without a field name is allowed (value area &)

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.

Unfortunately, there isn't any extra information in this error notice.

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DU604 - Details

• The SAP error message DU604 "Only one key area without a field name is allowed (value area &)" typically occurs in the context of data modeling or configuration in SAP, particularly when dealing with data sources, InfoObjects, or similar structures in SAP BW (Business Warehouse) or SAP HANA.
  
  Cause:
  This error arises when you are trying to define a key area in a data model or InfoObject without specifying a field name, and there is already another key area defined without a field name. In SAP, key areas are used to define how data is structured and accessed, and having multiple key areas without field names can lead to ambiguity in data retrieval and processing.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Key Area Definitions: Review the definitions of the key areas in your data model or InfoObject. Ensure that you only have one key area defined without a field