How To Fix CNV_DMC_MC_EXCEPTION075 - Structure &1 is a lookup table; cannot add structure at lower level

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_MC_EXCEPTION - Exception texts of Migration Object Modeller

• Message number: 075

• Message text: Structure &1 is a lookup table; cannot add structure at lower level

A lookup table contains records that are looked up from a field in
another table to fill in the value of that field. The table can be
referenced by rules and used by mapping operations, but does not
directly provide content for fields in the target system.

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_MC_EXCEPTION075 - Structure &1 is a lookup table; cannot add structure at lower level ?

  The SAP error message CNV_DMC_MC_EXCEPTION075 indicates that there is an issue related to the structure of a lookup table in the context of data migration or conversion processes, particularly when using the SAP Data Migration Cockpit (DMC). The error message states that a structure cannot be added at a lower level because it is defined as a lookup table.
  Cause:
  
  Lookup Table Definition: The structure you are trying to add is defined as a lookup table. Lookup tables are typically used to map values from one domain to another and are not intended to have subordinate structures or levels.
  Hierarchical Structure Misconfiguration: The error may arise if there is an attempt to create a hierarchical relationship where it is not allowed, such as trying to add a child structure to a lookup table.
  Data Model Constraints: The data model you are working with may have constraints that prevent certain types of structures from being nested or added at lower levels.
  
  Solution:
  
  Review Structure Definitions: Check the definition of the structure you are trying to add. Ensure that it is not defined as a lookup table if you intend to use it as a parent structure.
  Adjust Data Model: If the structure is indeed a lookup table, consider whether it is appropriate to use it in the context you are attempting. You may need to adjust your data model to avoid trying to add it at a lower level.
  Consult Documentation: Refer to the SAP documentation for the Data Migration Cockpit to understand the rules and limitations regarding the use of lookup tables and hierarchical structures.
  Use Alternative Structures: If you need to create a hierarchy, consider using a different structure that is not defined as a lookup table.
  
  Related Information:
  
  SAP Notes and Documentation: Check for any relevant SAP Notes that may provide additional context or solutions for this specific error message.
  Data Migration Cockpit (DMC): Familiarize yourself with the functionalities and limitations of the DMC, as it may have specific requirements for how data structures are defined and used.
  Community Forums: Engage with SAP community forums or support channels where other users may have encountered similar issues and can provide insights or solutions.
  
  If the problem persists after trying the above solutions, consider reaching out to SAP support for further assistance, providing them with detailed information about the context in which the error occurs.