How To Fix CNV_10020801 - Prefix &1 is not supported; check your input

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_10020 - Message class for package 10020

• Message number: 801

• Message text: Prefix &1 is not supported; check your input

What causes this issue?

The special character '~' in a table field is used in order to
distinguish between tables and other type of objects. The prefix &V1& is
used to identify the object type. For the prefix &V1&, there is no
interface package assigned.

How to fix this error?

Check the object name.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_10020801 - Prefix &1 is not supported; check your input ?

  The SAP error message CNV_10020801 indicates that a specific prefix (denoted as &1) is not supported in the context of a conversion or migration process. This error typically arises during data migration activities, especially when using SAP's tools for data conversion, such as the SAP S/4HANA Migration Cockpit or other data migration tools.
  Cause:
  
  
  Unsupported Prefix: The prefix you are trying to use is not recognized or supported by the system. This could be due to:
  
  The prefix being incorrectly defined in the system.
  The prefix being part of a naming convention that is not allowed or recognized by the migration tool.
  The prefix being associated with a data object that is not compatible with the current migration scenario.
  
  
  
  Configuration Issues: There may be configuration settings in the migration tool that do not allow for certain prefixes.
  
  
  Data Model Changes: If you are migrating from an older version of SAP to a newer one (like S/4HANA), there may be changes in the data model that affect the validity of certain prefixes.
  
  
  Solution:
  
  
  Check Input: Review the input data and ensure that the prefix you are using is valid and supported. You may need to refer to the documentation for the specific migration tool you are using to confirm which prefixes are allowed.
  
  
  Modify Prefix: If the prefix is indeed unsupported, consider changing it to a valid one that complies with the naming conventions of the target system.
  
  
  Consult Documentation: Look into the SAP documentation or notes related to the migration tool you are using. There may be specific guidelines or restrictions regarding prefixes.
  
  
  System Configuration: If you believe the prefix should be supported, check the system configuration and ensure that all necessary settings are correctly configured.
  
  
  SAP Support: If you are unable to resolve the issue, consider reaching out to SAP Support for assistance. They can provide insights specific to your system and migration scenario.
  
  
  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 Migration Cockpit or the specific tool you are using for data migration.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered similar issues and can share their solutions.
  
  By following these steps, you should be able to identify the cause of the error and implement a suitable solution.