How To Fix CNV_DMC_MC_EXCEPTION056 - Key field '&1' is invalid. Use 'X' or ' '.

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 056

• Message text: Key field '&1' is invalid. Use 'X' or ' '.

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_DMC_MC_EXCEPTION056 - Key field '&1' is invalid. Use 'X' or ' '. ?

  The SAP error message CNV_DMC_MC_EXCEPTION056 indicates that there is an issue with a key field in the Data Migration Cockpit (DMC) during a data migration process. Specifically, the error states that the key field represented by &1 is invalid and that it should be either 'X' (indicating a value) or ' ' (indicating no value).
  Cause:
  This error typically arises due to one of the following reasons:
  
  Incorrect Value: The key field is expected to have a specific value ('X' or ' '), but it has been provided with an invalid value.
  Data Mapping Issues: There may be a mismatch in the data mapping configuration, where the key field is not correctly defined or populated.
  Configuration Errors: The configuration settings for the migration process may not be set up correctly, leading to invalid key field values.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Key Field Value:
  
  Review the data being migrated and ensure that the key field specified in the error message is populated correctly. It should either be 'X' (indicating a valid entry) or ' ' (indicating no entry).
  
  
  
  Review Data Mapping:
  
  Go through the data mapping configuration in the DMC to ensure that the key fields are correctly defined and mapped to the source data.
  
  
  
  Validate Configuration:
  
  Check the configuration settings for the migration project. Ensure that all required fields are correctly configured and that there are no discrepancies.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation for the Data Migration Cockpit to understand the expected values for the key fields and any specific requirements for the migration process.
  
  
  
  Test with Sample Data:
  
  If possible, test the migration process with a small set of sample data to identify if the issue persists. This can help isolate the problem.
  
  
  
  Seek Support:
  
  If the issue cannot be resolved through the above steps, consider reaching out to SAP support or consulting with an SAP expert who can provide more specific guidance based on your system configuration and data.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Data Migration Cockpit Documentation: Familiarize yourself with the DMC documentation for best practices and guidelines on data migration.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify and resolve the issue related to the CNV_DMC_MC_EXCEPTION056 error message.