How To Fix CNV_MBT_46356 - Only field level assignment is allowed for this rule

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_MBT_46 - PCL message class

• Message number: 356

• Message text: Only field level assignment is allowed for this rule

What causes this issue?

The rule has more than one importing parameters and hence only field
level assignments can be done.

System Response

Domain level assignment will not be allowed for this rule.

How to fix this error?

If domain level assignment is necessary, there should be just one
importing parameter for the rule.

Procedure for System Administrators

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_MBT_46356 - Only field level assignment is allowed for this rule ?

  The SAP error message CNV_MBT_46356 typically occurs during data migration processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that there is an issue with the assignment of fields in a migration rule, specifically that only field-level assignments are permitted for the rule in question.
  Cause:
  The error arises when:
  
  Incorrect Assignment Type: The migration rule is trying to use a structure or table-level assignment instead of a field-level assignment. This means that the system expects you to map individual fields rather than entire structures or tables.
  Configuration Issues: There may be a misconfiguration in the migration settings or rules that leads to this error.
  Data Model Changes: If there have been changes in the data model or the migration template, it could lead to inconsistencies that trigger this error.
  
  Solution:
  To resolve the error CNV_MBT_46356, you can take the following steps:
  
  
  Check Migration Rules: Review the migration rules you have set up. Ensure that you are using field-level assignments where required. This means mapping individual fields from the source to the target rather than trying to map entire structures or tables.
  
  
  Adjust Mapping: If you find that you are trying to map a structure or table, break it down into its individual fields and create mappings for each field separately.
  
  
  Review Documentation: Consult the SAP documentation related to the specific migration scenario you are working on. This can provide insights into the expected configurations and mappings.
  
  
  Use Migration Cockpit: If you are using the SAP S/4HANA Migration Cockpit, ensure that you are following the guidelines for creating migration objects and rules. The cockpit often provides templates and examples that can help you set up your mappings correctly.
  
  
  Test with Sample Data: Before running a full migration, test your mappings with a small set of sample data to ensure that the mappings are correct and that the error does not occur.
  
  
  Consult SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance on the migration process.
  
  
  Related Information:
  
  Migration Cockpit: The SAP S/4HANA Migration Cockpit is a tool designed to facilitate the migration of data from legacy systems to SAP S/4HANA. Understanding how to use this tool effectively can help prevent errors.
  Data Migration Best Practices: Familiarize yourself with best practices for data migration, including data cleansing, validation, and testing.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can provide insights or solutions.
  
  By following these steps and understanding the context of the error, you should be able to resolve the issue and proceed with your data migration successfully.