How To Fix SWF_EXP_001256 - Multiple unspecified index access '[][]...' not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: SWF_EXP_001 - Expression Service Messages

• Message number: 256

• Message text: Multiple unspecified index access '[][]...' not supported

What causes this issue?

You have used multiple empty index entries one after the other. An
empty index expression corresponds to the projection of a column of an
internal table. The projection to a column cannot be repeated, that is,
when there are multiple index expressions, only every second one may be
empty.

System Response

This expression is not correct.

How to fix this error?

Enter an index expression for one of the bracket pairs.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SWF_EXP_001256 - Multiple unspecified index access '[][]...' not supported ?

  The SAP error message SWF_EXP_001256 indicates that there is an issue with accessing multiple unspecified indexes in a workflow or process. This typically occurs in the context of SAP Business Workflow or when dealing with complex data structures, such as tables or internal tables, where the system is unable to determine how to handle multiple index accesses.
  Cause:
  
  Complex Data Structures: The error often arises when the workflow attempts to access elements of a nested table or structure without properly specifying the indexes.
  Incorrect Workflow Configuration: The workflow may be incorrectly configured, leading to ambiguous references to data elements.
  Data Type Mismatch: There may be a mismatch in the expected data types, causing the system to fail in resolving the index access.
  Programming Errors: If custom code is involved, there may be programming errors that lead to this issue.
  
  Solution:
  
  Review Workflow Configuration: Check the workflow configuration to ensure that all data accesses are correctly defined. Make sure that the indexes are specified clearly.
  Specify Indexes: If you are accessing nested tables or structures, ensure that you specify the indexes explicitly. For example, instead of accessing table[][], use table[i][j] where i and j are the specific indexes.
  Check Data Types: Verify that the data types being used in the workflow match the expected types. Ensure that any custom code adheres to the expected data structures.
  Debugging: Use debugging tools to trace the workflow execution and identify where the error occurs. This can help pinpoint the exact location and cause of the issue.
  Consult Documentation: Refer to SAP documentation or notes related to the specific version of SAP you are using for any known issues or additional guidance.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Workflow Logs: Review workflow logs for additional error messages or warnings that may provide more context about the issue.
  
  If the problem persists after trying the above solutions, consider reaching out to SAP support for further assistance.