How To Fix CNV_DMC_MC_EXCEPTION015 - The variable &1 already exists

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 015

• Message text: The variable &1 already exists

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_EXCEPTION015 - The variable &1 already exists ?

  The SAP error message CNV_DMC_MC_EXCEPTION015 indicates that there is an attempt to create a variable that already exists in the system. This error typically occurs during data migration or conversion processes, particularly when using the SAP Data Migration Cockpit (DMC) or similar tools.
  Cause:
  The error is caused by the following scenarios:
  
  Duplicate Variable Creation: The migration process is trying to create a variable (e.g., a mapping variable, a transformation variable) that has already been defined in the system.
  Configuration Issues: There may be issues in the configuration or setup of the migration project that lead to the same variable being referenced multiple times.
  Data Model Conflicts: Conflicts in the data model where the same variable name is used in different contexts or mappings.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Existing Variables: 
  
  Review the list of existing variables in the migration project to confirm if the variable in question already exists.
  If it does, consider whether you can use the existing variable instead of creating a new one.
  
  
  
  Rename the Variable: 
  
  If you need to create a new variable, choose a different name that does not conflict with existing variables.
  
  
  
  Review Migration Configuration: 
  
  Go through the migration configuration settings to ensure that there are no duplicate entries or misconfigurations that could lead to this error.
  
  
  
  Consult Documentation: 
  
  Refer to the SAP documentation for the Data Migration Cockpit or the specific migration tool you are using for guidelines on variable naming conventions and best practices.
  
  
  
  Debugging: 
  
  If the issue persists, consider enabling debugging or logging to get more detailed information about where the error is occurring in the migration process.
  
  
  
  SAP Support: 
  
  If you are unable to resolve the issue, consider reaching out to SAP Support for assistance. Provide them with the error message and any relevant details about your migration project.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  Migration Cockpit Documentation: Review the official SAP documentation for the Data Migration Cockpit for insights on variable management and troubleshooting.
  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 the cause of the error and implement a solution to resolve it.