How To Fix NSDM_MIG_CONTROL171 - Aggr. &1, max. no. of indir. predecessors &2, actually &3 - not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: NSDM_MIG_CONTROL - Log message for migration

• Message number: 171

• Message text: Aggr. &1, max. no. of indir. predecessors &2, actually &3 - not supported

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message NSDM_MIG_CONTROL171 - Aggr. &1, max. no. of indir. predecessors &2, actually &3 - not supported ?

  The SAP error message NSDM_MIG_CONTROL171 typically occurs in the context of data migration or when working with the SAP Data Migration Cockpit. This error indicates that there is an issue with the number of indirect predecessors for a specific aggregation level in your data model.
  Cause:
  The error message states that the maximum number of indirect predecessors for a given aggregation level has been exceeded. Specifically, it indicates:
  
  &1: The aggregation level that is causing the issue.
  &2: The maximum allowed number of indirect predecessors.
  &3: The actual number of indirect predecessors that are present.
  
  This situation can arise due to:
  
  Data Model Complexity: The data model may have become too complex, with too many dependencies or relationships defined.
  Configuration Issues: There may be incorrect configurations in the data model or migration settings that lead to excessive indirect predecessors.
  System Limitations: SAP has certain limitations on the number of indirect predecessors that can be handled for performance reasons.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review the Aggregation Level: Check the aggregation level mentioned in the error message. Analyze its structure and the relationships defined within it.
  
  
  Reduce Indirect Predecessors: If possible, simplify the data model by reducing the number of indirect predecessors. This may involve:
  
  Modifying the data model to eliminate unnecessary relationships.
  Consolidating data sources or entities to reduce complexity.
  
  
  
  Check Configuration Settings: Ensure that the configuration settings for the data migration or the data model are correct. Look for any settings that might limit the number of predecessors.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to data migration and aggregation levels. There may be specific guidelines or best practices that can help you avoid this issue.
  
  
  Contact SAP Support: If the issue persists after trying the above steps, consider reaching out to SAP Support for further assistance. They may provide insights specific to your system configuration or version.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  Data Migration Cockpit: Familiarize yourself with the SAP Data Migration Cockpit and its limitations regarding data models and aggregation levels.
  Performance Considerations: Understand the performance implications of complex data models and how they can affect data migration processes.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.