How To Fix R8256 - DataSource &1 has an inconsistent key info. &3 for field &2

R8256 - Overview

• Message type: E = Error

• Message class: R8 - Messages from the meta data generation

• Message number: 256

• Message text: DataSource &1 has an inconsistent key info. &3 for field &2

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 R8256 - DataSource &1 has an inconsistent key info. &3 for field &2 ?

  The SAP error message R8256 indicates that there is an inconsistency in the key information for a DataSource. This typically occurs when the DataSource is not properly defined or when there are discrepancies in the key fields that are expected versus what is actually present in the DataSource.
  
  Cause:
  
  Inconsistent Key Fields: The key fields defined in the DataSource do not match the actual data structure or the data being extracted.
  Changes in Data Structure: If the underlying data structure of the source system has changed (e.g., fields added, removed, or renamed), it can lead to inconsistencies.
  Incorrect DataSource Configuration: The DataSource may not be configured correctly in terms of the key fields.
  Transport Issues: If the DataSource was transported from one system to another, there may be inconsistencies due to missing or incorrect transport settings.
  
  
  Solution:
  
  
  Check DataSource Configuration:
  
  Go to the DataSource in the SAP system (transaction code RSA1).
  Verify the key fields defined in the DataSource