How To Fix SWF_ODS_CORE020 - Unknown Collection type is received: &1

SAP Error Message - Details

• Message type: E = Error

• Message class: SWF_ODS_CORE - Messages for ODS runtime objects

• Message number: 020

• Message text: Unknown Collection type is received: &1

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SWF_ODS_CORE020 - Unknown Collection type is received: &1 ?

  The SAP error message SWF_ODS_CORE020, which states "Unknown Collection type is received: &1," typically occurs in the context of SAP Workflow or SAP Business Workflow. This error indicates that the system has received a collection type that it does not recognize or cannot process.
  Cause:
  
  Invalid Collection Type: The error is often caused by an invalid or unrecognized collection type being passed to the workflow. This could be due to a misconfiguration or a programming error in the workflow definition.
  Custom Development: If there are custom workflows or enhancements, the collection type might not be properly defined or registered in the system.
  Version Mismatch: There could be a mismatch between the versions of the components involved, leading to the system not recognizing the collection type.
  Data Corruption: In some cases, data corruption or inconsistencies in the workflow definitions can lead to this error.
  
  Solution:
  
  Check Workflow Definitions: Review the workflow definitions and ensure that all collection types used are correctly defined and recognized by the system.
  Debugging: If you have access to the development environment, you can debug the workflow to identify where the unknown collection type is being generated or passed.
  Custom Code Review: If there is custom code involved, review it to ensure that it is correctly handling collection types and that all necessary types are registered.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error. There may be patches or updates that resolve the issue.
  System Update: Ensure that your SAP system is up to date with the latest support packages and patches, as this can resolve compatibility issues.
  Consult Documentation: Refer to the SAP documentation for workflows to ensure that you are using the correct collection types and that they are properly configured.
  
  Related Information:
  
  SAP Workflow Documentation: Familiarize yourself with the SAP Business Workflow documentation to understand how collection types are defined and used.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Transaction Codes: Use transaction codes like SWDD (Workflow Builder) to analyze and modify workflows, and SWI1 (Work Item Selection) to check for work items that may be causing the issue.
  
  If the problem persists after trying the above solutions, consider reaching out to SAP support for further assistance.