How To Fix CNV20200109 - Error message: unknown_error in function module WS_UPLOAD

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV20200 - Messages for development class CNV_20200

• Message number: 109

• Message text: Error message: unknown_error in function module WS_UPLOAD

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV20200109 - Error message: unknown_error in function module WS_UPLOAD ?

  The SAP error message CNV20200109 with the description "unknown_error in function module WS_UPLOAD" typically occurs during data upload processes, particularly when using the SAP Data Transfer Workbench or similar tools. This error can arise due to various reasons, and here are some common causes, potential solutions, and related information:
  Causes:
  
  File Format Issues: The uploaded file may not be in the expected format (e.g., CSV, XLSX) or may contain invalid data.
  Data Consistency: The data being uploaded may violate integrity constraints or data types defined in the target SAP tables.
  Authorization Issues: The user performing the upload may not have the necessary authorizations to execute the upload function.
  System Configuration: There may be configuration issues in the SAP system that affect the upload process.
  Network Issues: Temporary network issues or interruptions during the upload process can lead to this error.
  Function Module Errors: There may be bugs or issues within the WS_UPLOAD function module itself.
  
  Solutions:
  
  Check File Format: Ensure that the file being uploaded is in the correct format and adheres to the expected structure. Validate the data for any inconsistencies.
  Data Validation: Review the data for any potential issues, such as incorrect data types, missing mandatory fields, or duplicate entries.
  User Authorizations: Verify that the user has the necessary authorizations to perform the upload. Check roles and permissions in the SAP system.
  Review Logs: Check the application logs (transaction SLG1) for more detailed error messages that can provide insights into the issue.
  Test with Sample Data: Try uploading a smaller sample of data to see if the error persists. This can help isolate the problematic data.
  Check System Configuration: Review the configuration settings related to data uploads in the SAP system. Ensure that all necessary settings are correctly configured.
  Consult SAP Notes: Look for relevant SAP Notes or patches that may address known issues with the WS_UPLOAD function module.
  Contact SAP Support: If the issue persists and cannot be resolved, consider reaching out to SAP Support for further assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE37 (Function Module), SLG1 (Application Log), and SE80 (Object Navigator) for debugging.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found.
  Documentation: Review SAP documentation related to data uploads and the specific function module (WS_UPLOAD) for any additional guidance.
  
  By following these steps, you should be able to diagnose and potentially resolve the CNV20200109 error in your SAP environment.