How To Fix CNV_MBT_SHELL081 - Structure of file & unknown

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_MBT_SHELL - Shell Creation

• Message number: 081

• Message text: Structure of file & unknown

What causes this issue?

The system cannot read the content of the file.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check whether the file is corrupt.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_MBT_SHELL081 - Structure of file & unknown ?

  The SAP error message CNV_MBT_SHELL081 typically indicates that there is an issue with the structure of a file being processed in a data migration or conversion scenario. This error is often encountered during the execution of the SAP Data Migration Workbench (DMW) or during the use of the SAP S/4HANA Migration Cockpit.
  Cause:
  The error message CNV_MBT_SHELL081 Structure of file & unknown suggests that the system is unable to recognize the structure of the input file. This can happen due to several reasons:
  
  Incorrect File Format: The file may not be in the expected format (e.g., CSV, XML) or may have been corrupted.
  Missing or Incorrect Header: The file may be missing the required header row or the header may not match the expected field names.
  Data Type Mismatch: The data types in the file may not match the expected data types in the target structure.
  Unsupported Structure: The file may contain fields or structures that are not supported by the migration tool.
  Configuration Issues: There may be issues with the configuration settings in the migration tool that are causing the file structure to be unrecognized.
  
  Solution:
  To resolve the error, you can take the following steps:
  
  Check File Format: Ensure that the file is in the correct format as required by the migration tool. If it is a CSV file, check for proper delimiters and encoding.
  Verify Header Row: Make sure that the header row of the file matches the expected field names in the target structure. Correct any discrepancies.
  Validate Data Types: Review the data types of the fields in the file and ensure they match the expected data types in the target structure. Convert or adjust the data as necessary.
  Review Migration Configuration: Check the configuration settings in the migration tool to ensure that they are set up correctly for the file being processed.
  Test with Sample Data: If possible, create a small sample file with known good data and structure to test the migration process. This can help isolate the issue.
  Consult Documentation: Refer to the SAP documentation for the specific migration tool you are using to ensure that you are following the correct procedures and guidelines.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to the specific migration tool you are using for any known issues or patches that may address this error.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Logs and Traces: Review any logs or traces generated during the migration process for additional details that may help identify the root cause of the error.
  
  By following these steps, you should be able to identify and resolve the issue causing the CNV_MBT_SHELL081 error message.