How To Fix CNV_MBT_46450 - Rule exists for same table and field name; use another combination

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_MBT_46 - PCL message class

• Message number: 450

• Message text: Rule exists for same table and field name; use another combination

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_MBT_46450 - Rule exists for same table and field name; use another combination ?

  The SAP error message CNV_MBT_46450 indicates that there is a conflict in the mapping rules during a data migration or transformation process. Specifically, it means that there are multiple mapping rules defined for the same table and field name, which is causing ambiguity in the data processing.
  Cause:
  
  
  Duplicate Mapping Rules: The error typically arises when there are two or more mapping rules that apply to the same table and field combination. This can happen if:
  
  The mapping rules were created manually and inadvertently duplicated.
  There are multiple migration projects or configurations that overlap in their definitions.
  
  
  
  Configuration Issues: Sometimes, the configuration settings in the migration tool or the data mapping tool may not be set up correctly, leading to conflicts.
  
  
  Solution:
  To resolve the error CNV_MBT_46450, you can take the following steps:
  
  
  Identify Duplicate Rules:
  
  Review the mapping rules defined for the specific table and field mentioned in the error message.
  Look for any duplicate entries that may exist.
  
  
  
  Modify or Remove Duplicates:
  
  If you find duplicate rules, decide which one is necessary and remove or modify the others to eliminate the conflict.
  Ensure that each table and field combination has a unique mapping rule.
  
  
  
  Use a Different Combination:
  
  If the duplicates are necessary for different contexts, consider using a different combination of table and field names to avoid the conflict.
  
  
  
  Check Configuration Settings:
  
  Review the configuration settings of the migration tool to ensure that there are no overlapping definitions that could lead to this error.
  
  
  
  Testing:
  
  After making changes, test the migration process again to ensure that the error has been resolved.
  
  
  
  Related Information:
  
  Migration Tools: This error is often encountered in SAP data migration tools such as SAP S/4HANA Migration Cockpit or SAP Data Services.
  Documentation: Refer to the official SAP documentation for the specific migration tool you are using for more detailed guidance on mapping rules and configurations.
  Support: If the issue persists after following the above steps, consider reaching out to SAP support or consulting with an SAP expert who can provide more tailored assistance based on your specific environment and configuration.
  
  By addressing the duplicate mapping rules and ensuring unique combinations, you should be able to resolve the CNV_MBT_46450 error effectively.