How To Fix DMC_GENERAL101 - Structure tree type of &3 changed from &1 to &2

SAP Error Message - Details

• Message type: E = Error

• Message class: DMC_GENERAL - MWB: General Messages

• Message number: 101

• Message text: Structure tree type of &3 changed from &1 to &2

What causes this issue?

Structure tree type of &3 changed from &1 to &2

System Response

The type of the specified structure node has been changed.
The meaning of these types is as follows:
1. structure definition from ABAP data dictionary
2. message type
3. hierarchy node
4. table type
5. structure type
6. single field
7. included structure tree from another conversion object

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Changing the type of an existing structure tree can have severe
consequences. For example, you must make sure that, if such a change is
done on the receiver side, there is a corresponding change also for the
corresponding structure tree on the sender side, and vice versa. It must
be checked that the mutual assignment of structure trees of sender and
receiver container is done in a consistent way.

How to fix this error?

Check if for the structure tree the type of which has been changed, a
reasonable structure relationship is defined (usually a relationship
with a structure tree of the same type

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DMC_GENERAL101 - Structure tree type of &3 changed from &1 to &2 ?

  The SAP error message DMC_GENERAL101 indicates that there has been a change in the structure tree type of a data object during a data migration or data transfer process. This error typically arises in the context of SAP Data Migration Cockpit (DMC) or similar data management tools when the structure of the data being processed does not match the expected structure defined in the system.
  Cause:
  The error message DMC_GENERAL101 is triggered when:
  
  The structure of the data being imported or processed has changed, meaning that the expected data format (type) does not match the actual data format.
  This can occur due to changes in the underlying data model, such as modifications in the source system or changes in the target system's data structure.
  It may also happen if there are inconsistencies in the mapping definitions or if the data source has been updated without corresponding updates in the target structure.
  
  Solution:
  To resolve the DMC_GENERAL101 error, you can take the following steps:
  
  
  Check Data Structure: Verify the structure of the data being imported. Ensure that it matches the expected structure defined in the target system. This includes checking field names, data types, and hierarchy.
  
  
  Update Mapping: If there have been changes in the source or target data structures, update the mapping definitions in the Data Migration Cockpit to reflect these changes.
  
  
  Review Change Logs: Look at the change logs or documentation to identify any recent changes made to the data model in either the source or target systems.
  
  
  Test with Sample Data: If possible, test the migration with a smaller set of sample data to isolate the issue and confirm that the structure is correct.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to the specific data migration process you are using. There may be specific guidelines or known issues related to the error.
  
  
  Contact SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP support for assistance. Provide them with detailed information about the error, including the context in which it occurred.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Data Migration Cockpit Documentation: Review the official SAP documentation for the Data Migration Cockpit for best practices and guidelines on data structure and mapping.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered similar issues and can share their solutions.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.