How To Fix SWF_EXP_001203 - Byte code contains invalid type specification '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: SWF_EXP_001 - Expression Service Messages

• Message number: 203

• Message text: Byte code contains invalid type specification '&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_EXP_001203 - Byte code contains invalid type specification '&1' ?

  The SAP error message SWF_EXP_001203 indicates that there is an issue with the byte code in a workflow, specifically that it contains an invalid type specification. This error typically arises in the context of SAP Business Workflow when the system encounters an unexpected or unsupported type in the workflow definition.
  Cause:
  
  Invalid Type Specification: The error is often caused by an invalid or unsupported data type being used in the workflow. This could happen if the workflow is referencing a data type that is not recognized or is incorrectly defined.
  Changes in Data Types: If there have been changes to the underlying data types in the system (e.g., changes in the structure of a table or a data element), it may lead to this error.
  Corrupted Workflow: The workflow definition may be corrupted or improperly configured, leading to inconsistencies in the byte code.
  
  Solution:
  
  Check Workflow Definition: Review the workflow definition for any invalid or unsupported data types. Ensure that all data types used in the workflow are correctly defined and supported by the system.
  Rebuild the Workflow: If the workflow is corrupted, consider rebuilding it. You can do this by creating a new workflow or copying the existing one and making necessary adjustments.
  Transport Issues: If the workflow was transported from another system, ensure that all dependencies and data types are correctly transported and available in the target system.
  Check for Updates: Ensure that your SAP system is up to date with the latest patches and updates, as this may resolve known issues related to workflows.
  Debugging: Use the workflow debugging tools available in SAP to trace the execution and identify where the invalid type specification is occurring.
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like SWDD (Workflow Builder) to access and modify workflows.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional guidance.
  Documentation: Refer to the official SAP documentation for workflows to understand the valid data types and structures that can be used.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance, providing them with detailed information about the workflow and the context in which the error occurs.