How To Fix CMD_HIERARCHY002 - Operation on entity type '&1' is only allowed in changeset.

SAP Error Message - Details

• Message type: E = Error

• Message class: CMD_HIERARCHY - Messages for CMD_HIERARCHY Gateway service

• Message number: 002

• Message text: Operation on entity type '&1' is only allowed in changeset.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CMD_HIERARCHY002 - Operation on entity type '&1' is only allowed in changeset. ?

  The SAP error message CMD_HIERARCHY002 indicates that an operation on a specific entity type is being attempted outside of a changeset. This error typically occurs in the context of SAP's Cloud Application Programming (CAP) model or when working with OData services, particularly when dealing with hierarchical data structures.
  Cause:
  The error arises when you try to perform an operation (like create, update, or delete) on an entity type that is expected to be part of a changeset, but the operation is being executed outside of that context. Changesets are used to group multiple operations together, ensuring that they are executed as a single transaction. This is particularly important for hierarchical data where the integrity of the data structure must be maintained.
  Solution:
  To resolve this error, you should ensure that the operation you are trying to perform is encapsulated within a changeset. Here are the steps you can take:
  
  
  Use Changesets Properly: Make sure that your operations on the entity type are wrapped in a changeset. In OData, this is typically done by using the $batch request to group multiple operations together.
  
  
  Check Your Code: Review the code where the operation is being performed. Ensure that the logic for creating or modifying the entity is correctly placed within a changeset context.
  
  
  Review the Service Implementation: If you are developing a custom OData service, ensure that the service implementation correctly handles changesets and that the entity types are defined properly.
  
  
  Testing: After making changes, test the operations again to ensure that they are now being processed correctly within the changeset.
  
  
  Related Information:
  
  OData Protocol: Familiarize yourself with the OData protocol, especially how batch requests and changesets work. The OData documentation provides detailed information on how to structure these requests.
  SAP Documentation: Check the SAP Help Portal for specific documentation related to the version of SAP you are using, as there may be version-specific nuances.
  Debugging: Use debugging tools available in your development environment to trace the execution flow and identify where the operation is being called outside of a changeset.
  
  By following these guidelines, you should be able to resolve the CMD_HIERARCHY002 error and ensure that your operations on entity types are performed correctly within the required context.