How To Fix DMC_RT_MSG559 - More than one occurrence of schema node

DMC_RT_MSG559 - Overview

• Message type: E = Error

• Message class: DMC_RT_MSG - DMC: Runtime Object Messages

• Message number: 559

• Message text: More than one occurrence of schema node

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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Smart SAP Assistant

• What is the cause and solution for SAP error message DMC_RT_MSG559 - More than one occurrence of schema node ?

  The SAP error message DMC_RT_MSG559 ("More than one occurrence of schema node") typically occurs in the context of data migration or data transformation processes, particularly when using SAP Data Migration Cockpit (DMC) or similar tools. This error indicates that there are multiple instances of a schema node that should be unique, leading to ambiguity in the data mapping or transformation process.
  
  Cause:
  
  Duplicate Entries: The most common cause is that the source data contains duplicate entries for a specific schema node that is expected to be unique.
  Incorrect Mapping: There may be an issue with how the data is mapped from the source to the target, where the schema definition expects a single occurrence but finds multiple.
  
  Configuration Issues: The configuration of the data migration or transformation process may not align with the expected structure of the data.
  
  
  Solution:
  
  
  Check Source Data: Review the source data for duplicates. Ensure that the data being migrated does not