How To Fix SWF_UTL_000020 - Object reference expected: '&1' cannot be converted to &2 format

SWF_UTL_000020 - Overview

• Message type: E = Error

• Message class: SWF_UTL_000 - Messages for I/O - Service Class CL_SWF_IO_SERVICES

• Message number: 020

• Message text: Object reference expected: '&1' cannot be converted to &2 format

Self-Explanatory Message

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SWF_UTL_000020 - Details

• The SAP error message SWF_UTL_000020 indicates that there is an issue with object reference conversion in the workflow. Specifically, it means that the system expected an object of a certain type but received an object that cannot be converted to that type. The placeholders &1 and &2 in the message represent the actual object reference and the expected format, respectively.
  
  Cause:
  
  Type Mismatch: The most common cause of this error is a type mismatch where the workflow is trying to use an object that is not compatible with the expected type.
  Incorrect Workflow Configuration: The workflow might be incorrectly configured, leading to the system trying to process an object that does not match the expected format.
  Data Issues: There may be issues with the data being processed, such as missing or corrupted data that leads to an invalid object reference.
  Custom Code: If there is custom code involved in the workflow, it may not be